Home
%3CLINGO-SUB%20id%3D%22lingo-sub-77094%22%20slang%3D%22en-US%22%3ESimplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-77094%22%20slang%3D%22en-US%22%3E%3CP%3E%3CEM%3ENote%3A%20This%20article%20applies%20only%20to%26nbsp%3BOffice%20365%20Worldwide%20(including%20Government%20Community%20Cloud).%20For%20guidance%20on%26nbsp%3B%3CA%20class%3D%22ocpArticleLink%22%20href%3D%22https%3A%2F%2Fsupport.office.com%2Fen-gb%2Farticle%2FOffice-365-operated-by-21-Vianet-5c47c07d-f9b6-4b78-a329-bfdc1b6da7a0%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EOffice%20365%20operated%20by%2021%20Vianet%3C%2FA%3E%2C%20%3CA%20class%3D%22ocpArticleLink%22%20href%3D%22https%3A%2F%2Fsupport.office.com%2Fen-gb%2Farticle%2FOffice-365-Germany-8a113a50-0071-4155-bb8e-eba5a8dbd4c8%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EOffice%20365%20Germany%3C%2FA%3E%2C%20%3CA%20class%3D%22ocpArticleLink%22%20href%3D%22https%3A%2F%2Fsupport.office.com%2Fen-gb%2Farticle%2FOffice-365-US-Government-DoD-5d7dce60-4892-4b58-b45e-ee42fe8a907f%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EOffice%20365%20U.S.%20Government%20DoD%3C%2FA%3E%20or%20%3CA%20class%3D%22ocpArticleLink%22%20href%3D%22https%3A%2F%2Fsupport.office.com%2Fen-gb%2Farticle%2FOffice-365-US-Government-GCC-High-cbd2369c-fd96-464c-bf48-c99826b459ee%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EOffice%20365%20U.S.%20Government%20GCC%20High%3C%2FA%3E%20click%20on%20the%20respective%20links.%3C%2FEM%3E%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3E%3CSPAN%3EWe%20are%20happy%20to%20announce%20that%20the%2050%2C000-59%2C999%20port%20range%20(UDP%20and%20TCP)%20is%20no%20longer%20a%20requirement%20for%20Skype%20for%20Business%20endpoints%20to%20communicate%20with%20Skype%20for%20Business%20Online.%3C%2FSPAN%3E%3C%2FP%3E%0A%3CP%3E%3CSPAN%3EEarlier%20this%20year%20we%20talked%20about%20making%20simplification%20for%20network%20connectivity%20for%20Skype%20for%20Business%20Online%20(see%20blog%20article%20%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2FSkype-for-Business-Blog%2FUpdated-IP-ranges-and-ports-for-Skype-for-Business-Online%2Fba-p%2F47470%22%20target%3D%22_blank%22%3Ehere%3C%2FA%3E)%20and%20we%20recently%20updated%20our%20guidance%20and%20removed%20the%20mentioned%20port%20range%20as%20a%20requirement%3A%20%3CA%20href%3D%22https%3A%2F%2Fsupport.office.com%2Fen-us%2Farticle%2FOffice-365-URLs-and-IP-address-ranges-8548a211-3fe7-47cb-abb1-355ea5aa88a2%3Fui%3Den-US%26amp%3Brs%3Den-US%26amp%3Bad%3DUS%26amp%3BfromAR%3D1%23bkmk_lyo%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EOffice%20365%20URLs%20and%20IP%20address%20ranges%3C%2FA%3E%3C%2FSPAN%3E%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3E%3CSTRONG%3ESo%20which%20ports%20are%20required%20for%20clients%3F%3C%2FSTRONG%3E%3C%2FP%3E%0A%3CP%3E%3CSPAN%3EAll%20clients%20need%20to%20be%20able%20to%20directly%20connect%20to%20Skype%20for%20Business%20Online%20on%20the%20following%20destination%20ports%3A%20(the%20IP%20addresses%20and%20FQDNs%20can%20be%20found%20in%20the%20%3CA%20href%3D%22https%3A%2F%2Fsupport.office.com%2Fen-us%2Farticle%2FOffice-365-URLs-and-IP-address-ranges-8548a211-3fe7-47cb-abb1-355ea5aa88a2%3Fui%3Den-US%26amp%3Brs%3Den-US%26amp%3Bad%3DUS%26amp%3BfromAR%3D1%23bkmk_lyo%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EOffice%20365%20URLs%20and%20IP%20address%20ranges%3C%2FA%3E)%3C%2FSPAN%3E%3C%2FP%3E%0A%3CUL%3E%0A%3CLI%3E%3CSPAN%3ETCP%2080%2C%20443%3C%2FSPAN%3E%3C%2FLI%3E%0A%3CLI%3E%3CSPAN%3EUDP%203478%2C%203479%2C%203480%2C%203481%3C%2FSPAN%3E%3C%2FLI%3E%0A%3CLI%3E%3CSPAN%3EOptional%3A%20UDP%2FTCP%2050%2C000-59%2C999%3C%2FSPAN%3E%3C%2FLI%3E%0A%3C%2FUL%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3E%3CSTRONG%3EIs%20there%20a%20minimum%20client%20version%20required%20to%20benefit%20from%20the%20port%20changes%3F%3C%2FSTRONG%3E%3C%2FP%3E%0A%3CP%3E%3CSPAN%3EThis%20change%20applies%20to%20all%20clients%20supported%20against%20Skype%20for%20Business%20Online.%20No%20clients%20are%20excluded%20and%20there%20are%20no%20specific%20minimum%20version%20required%20(although%20we%20always%20recommend%20to%20run%20the%20latest%20version).%3C%2FSPAN%3E%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3E%3CSTRONG%3EWhy%20are%20these%20ports%20not%20required%20anymore%3F%3C%2FSTRONG%3E%3C%2FP%3E%0A%3CP%3E%3CSPAN%3ETo%20answer%20this%20question%2C%20it%20is%20important%20to%20understand%20first%20how%20the%2050%2C000-59%2C999%20ports%20were%20used%20in%20the%20first%20place.%20(To%20understand%20all%20the%20details%20of%20their%20purpose%2C%20we%20recommend%20watching%20%3CA%20href%3D%22http%3A%2F%2Faka.ms%2Fsa-ice%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3ETroubleshoot%20media%20flows%20in%20Skype%20for%20Business%20across%20online%2C%20server%20and%20hybrid%3C%2FA%3E.)%3C%2FSPAN%3E%3C%2FP%3E%0A%3CP%3E%3CSPAN%3ELet's%20have%20the%20following%20example%3A%3C%2FSPAN%3E%3C%2FP%3E%0A%3CUL%3E%0A%3CLI%3E%3CSPAN%3EUser%20A%20wants%20to%20call%20User%20B%3C%2FSPAN%3E%3C%2FLI%3E%0A%3CLI%3E%3CSPAN%3EFor%20the%20sake%20of%20the%20example%2C%20the%20direct%20connection%20between%20User%20A%20and%20User%20B%20is%20blocked%20(e.g.%20User%20and%20User%20B%20are%20at%20different%20branch%20offices%20behind%20firewalls)%2C%20so%20the%20media%20traffic%20cannot%20go%20directly%20peer%20to%20peer%20and%20needs%20to%20flow%20via%20Skype%20for%20Business%20Online%3C%2FSPAN%3E%3C%2FLI%3E%0A%3CLI%3E%3CSPAN%3EThere%20are%20now%20the%20following%20possible%20media%20paths%3C%2FSPAN%3E%3CUL%3E%0A%3CLI%3E%3CSPAN%3EThe%2050%2C000-59%2C999%20port%20range%20can%20be%20leveraged%20to%20include%20only%20a%20single%20Relay%20Server%20in%20the%20media%20path%3C%2FSPAN%3E%3C%2FLI%3E%0A%3CLI%3E%3CSPAN%3EWithout%20the%2050%2C000-59%2C999%20port%20range%2C%20the%20traffic%20needs%20to%20travel%20via%20two%20Relay%20Server.%3C%2FSPAN%3E%3C%2FLI%3E%0A%3C%2FUL%3E%0A%3C%2FLI%3E%0A%3C%2FUL%3E%0A%3CP%3E%3CSPAN%3EAs%20you%20can%20see%2C%20closing%20the%2050%2C000-59%2C999%20port%20range%20will%20force%20the%20traffic%20to%20travel%20via%20an%20additional%20hop.%20While%20logic%20tells%20us%20that%20usually%20we%20want%20to%20avoid%20additional%20hops%20under%20all%20circumstances%2C%20the%20analysis%20on%20call%20quality%20data%20has%20shown%20us%2C%20that%20this%20additional%20hop%20does%20not%20significantly%20affect%20call%20quality%20-%20since%20both%20these%20Relay%20Servers%20are%20homed%20on%20the%20Microsoft%20Network%2C%20all%20traffic%20between%20the%20Relay%20Servers%20is%20sent%20over%20a%20highly%20reliable%20pipe%20designed%20for%20real-time%20communication.%3C%2FSPAN%3E%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3E%3CSTRONG%3EOur%20organization%20has%20these%20ports%20open%2C%20should%20we%20close%20them%3F%3C%2FSTRONG%3E%3C%2FP%3E%0A%3CP%3E%3CSPAN%3EHaving%20the%2050%2C000-59%2C999%20port%20range%20open%20can%20still%20have%20(some)%20benefits%20when%20it%20comes%20to%20call%20setup%20times%20and%20under%20some%20circumstances%20on%20call%20quality.%20However%20in%20our%20data%20analysis%20and%20pilot%20deployments%20with%20some%20customers%20these%20differences%20did%20not%20show%20significance.%20If%20you%20have%20the%20ports%20open%20today%2C%20it%20makes%20sense%20to%20leave%20them%20open.%3C%2FSPAN%3E%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3E%3CSTRONG%3EWhat%20does%20this%20change%20for%20hybrid%20between%20Skype%20for%20Business%20Server%20and%20Skype%20for%20Business%20Online%3F%3C%2FSTRONG%3E%3C%2FP%3E%0A%3CP%3E%3CSPAN%3EThis%20change%20only%20applies%20to%20users%20who%20are%20homed%20in%20Skype%20for%20Business%20Online.%20If%20you%20have%20an%20on-premises%20deployment%20of%20Skype%20for%20Business%2C%20the%20requirements%20for%20your%20Edge%20Server%20to%20communicate%20to%20Skype%20for%20Business%20Online%20remain%20unchanged%20(and%20also%20for%20any%20Federation%20scenarios%20including%20Skype%20for%20Business%20on-premises).%3C%2FSPAN%3E%3C%2FP%3E%0A%3CP%3E%3CSPAN%3EThe%20A%2FV%20Edge%20Server%20in%20your%20environment%20will%20need%20to%20be%20configured%20liked%20this.%20Please%20note%20that%20the%20Source%20Port%20is%20only%20relevant%2C%20if%20your%20firewall%20requires%20a%20source%20port%20to%20be%20specified%20(and%20a%20lot%20of%20firewalls%20do%20not%20require%20this%20setting)%3A%3C%2FSPAN%3E%3C%2FP%3E%0A%3CTABLE%20border%3D%222%22%3E%0A%3CTBODY%3E%0A%3CTR%3E%0A%3CTD%20width%3D%22174%22%3E%3CP%3E%3CSPAN%3ESource%20IP%3C%2FSPAN%3E%3C%2FP%3E%0A%3C%2FTD%3E%0A%3CTD%20width%3D%22174%22%3E%3CP%3E%3CSPAN%3EDestination%20IP%3C%2FSPAN%3E%3C%2FP%3E%0A%3C%2FTD%3E%0A%3CTD%20width%3D%22132%22%3E%3CP%3E%3CSPAN%3ESource%20Port%3C%2FSPAN%3E%3C%2FP%3E%0A%3C%2FTD%3E%0A%3CTD%20width%3D%22138%22%3E%3CP%3E%3CSPAN%3EDestination%20Port%3C%2FSPAN%3E%3C%2FP%3E%0A%3C%2FTD%3E%0A%3C%2FTR%3E%0A%3CTR%3E%0A%3CTD%20width%3D%22174%22%3E%3CP%3E%3CSPAN%3EA%2FV%20Edge%20service%20interface%3C%2FSPAN%3E%3C%2FP%3E%0A%3C%2FTD%3E%0A%3CTD%20width%3D%22174%22%3E%3CP%3EAny%3C%2FP%3E%0A%3C%2FTD%3E%0A%3CTD%20width%3D%22132%22%3E%3CP%3E%3CSPAN%3EUDP%203478%3C%2FSPAN%3E%3C%2FP%3E%0A%3C%2FTD%3E%0A%3CTD%20width%3D%22138%22%3E%3CP%3E%3CSPAN%3EUDP%203478%3C%2FSPAN%3E%3C%2FP%3E%0A%3C%2FTD%3E%0A%3C%2FTR%3E%0A%3CTR%3E%0A%3CTD%20width%3D%22174%22%3E%3CP%3E%3CSPAN%3EA%2FV%20Edge%20service%20interface%3C%2FSPAN%3E%3C%2FP%3E%0A%3C%2FTD%3E%0A%3CTD%20width%3D%22174%22%3E%3CP%3E%3CSPAN%3EA%3C%2FSPAN%3Eny%3C%2FP%3E%0A%3C%2FTD%3E%0A%3CTD%20width%3D%22132%22%3E%3CP%3E%3CSPAN%3ETCP%2050%2C000-59%2C999%3C%2FSPAN%3E%3C%2FP%3E%0A%3C%2FTD%3E%0A%3CTD%20width%3D%22138%22%3E%3CP%3E%3CSPAN%3ETCP%20443%3C%2FSPAN%3E%3C%2FP%3E%0A%3C%2FTD%3E%0A%3C%2FTR%3E%0A%3CTR%3E%0A%3CTD%20width%3D%22174%22%3E%3CP%3EAny%3C%2FP%3E%0A%3C%2FTD%3E%0A%3CTD%20width%3D%22174%22%3E%3CP%3E%3CSPAN%3EA%2FV%20Edge%20service%20interface%3C%2FSPAN%3E%3C%2FP%3E%0A%3C%2FTD%3E%0A%3CTD%20width%3D%22132%22%3E%3CP%3E%3CSPAN%3EAny%3C%2FSPAN%3E%3C%2FP%3E%0A%3C%2FTD%3E%0A%3CTD%20width%3D%22138%22%3E%3CP%3E%3CSPAN%3EUDP%203478%3C%2FSPAN%3E%3C%2FP%3E%0A%3C%2FTD%3E%0A%3C%2FTR%3E%0A%3CTR%3E%0A%3CTD%20width%3D%22174%22%3E%3CP%3EAny%3C%2FP%3E%0A%3C%2FTD%3E%0A%3CTD%20width%3D%22174%22%3E%3CP%3E%3CSPAN%3EA%2FV%20Edge%20service%20interface%3C%2FSPAN%3E%3C%2FP%3E%0A%3C%2FTD%3E%0A%3CTD%20width%3D%22132%22%3E%3CP%3E%3CSPAN%3EAny%3C%2FSPAN%3E%3C%2FP%3E%0A%3C%2FTD%3E%0A%3CTD%20width%3D%22138%22%3E%3CP%3E%3CSPAN%3ETCP%20443%3C%2FSPAN%3E%3C%2FP%3E%0A%3C%2FTD%3E%0A%3C%2FTR%3E%0A%3C%2FTBODY%3E%0A%3C%2FTABLE%3E%0A%3CP%3E%3CSPAN%3E%26nbsp%3B%3C%2FSPAN%3E%3C%2FP%3E%0A%3CP%3E%3CSPAN%3EFull%20requirements%20for%20Skype%20for%20Business%20Edge%20Server%20can%20be%20found%20here%3A%20%3CA%20href%3D%22https%3A%2F%2Ftechnet.microsoft.com%2Fen-us%2Flibrary%2Fmt346415.aspx%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EEdge%20Server%20environmental%20requirements%20in%20Skype%20for%20Business%20Server%202015%3C%2FA%3E.%20%3C%2FSPAN%3E%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3E%3CSTRONG%3EDoes%20this%20change%20anything%20for%20Cloud%20Connector%20Edition%3F%3C%2FSTRONG%3E%3C%2FP%3E%0A%3CP%3E%3CSPAN%3ENo%2C%20the%20requirements%20for%20Cloud%20Connector%20Edition%20(see%20%3CA%20href%3D%22https%3A%2F%2Ftechnet.microsoft.com%2FEN-US%2Flibrary%2Fmt605227.aspx%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EPlan%20for%20Skype%20for%20Business%20Cloud%20Connector%20Edition%3C%2FA%3E)%20remain%20unchanged.%3C%2FSPAN%3E%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3E%3CSTRONG%3ECall%20to%20Action%3C%2FSTRONG%3E%3C%2FP%3E%0A%3COL%3E%0A%3CLI%3E%3CSPAN%3ECelebrate%20about%20the%20simplified%20port%20requirements%3C%2FSPAN%3E%3C%2FLI%3E%0A%3CLI%3E%3CSPAN%3EUpdate%20any%20design%20templates%20you%20might%20have%3C%2FSPAN%3E%3C%2FLI%3E%0A%3CLI%3E%3CSPAN%3EFor%20future%20deployments%2C%20open%20only%20TCP%2080%2C%20443%20and%20UDP%203478%2C%203479%2C%203480%2C%203481%20per%20new%20guideline%20(and%2C%20optionally%2C%2050%2C000-59%2C999%20UDP%20and%20TCP)%3C%2FSPAN%3E%3C%2FLI%3E%0A%3C%2FOL%3E%0A%3CP%3EIf%20you%20have%20any%20questions%20or%20comments%2C%20please%20let%20us%20know%20in%20the%20%3CA%20href%3D%22http%3A%2F%2Faka.ms%2Fsofcommunity%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3Ecommunity%3C%2FA%3E%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3E%3CEM%3EThis%20post%20is%20brought%20to%20you%20by%20%3CA%20href%3D%22http%3A%2F%2Faka.ms%2Fskypeacademy%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3ESkype%20Academy%3C%2FA%3E.%20Visit%20Skype%20Academy%20for%20technical%20trainings%20and%20readiness%20around%20the%20Skype%20Operations%20Framework.%20%3C%2FEM%3E%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-TEASER%20id%3D%22lingo-teaser-77094%22%20slang%3D%22en-US%22%3E%3CP%3E%3CSPAN%20class%3D%22lia-inline-image-display-wrapper%20lia-image-align-inline%22%20style%3D%22width%3A%20372px%3B%22%3E%3CIMG%20src%3D%22https%3A%2F%2Fgxcuf89792.i.lithium.com%2Ft5%2Fimage%2Fserverpage%2Fimage-id%2F15684i0E69ECB8E94BF69E%2Fimage-size%2Flarge%3Fv%3D1.0%26amp%3Bpx%3D999%22%20alt%3D%22connectivity.gif%22%20title%3D%22connectivity.gif%22%20%2F%3E%3C%2FSPAN%3E%3C%2FP%3E%3C%2FLINGO-TEASER%3E%3CLINGO-LABS%20id%3D%22lingo-labs-77094%22%20slang%3D%22en-US%22%3E%3CLINGO-LABEL%3EProduct%20Updates%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3ESkype%20Academy%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3ESkype%20for%20Business%3C%2FLINGO-LABEL%3E%3C%2FLINGO-LABS%3E%3CLINGO-SUB%20id%3D%22lingo-sub-309800%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-309800%22%20slang%3D%22en-US%22%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F259513%22%20target%3D%22_blank%22%3E%40Shebin_CMGi123%3C%2FA%3E%2C%20I%20recommend%20to%20open%20a%20case%20with%20support.%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-307947%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-307947%22%20slang%3D%22en-US%22%3E%3CP%3EWe%20have%20all%20ports%20opened%20on%20our%20firewall%20and%20also%20matched%20the%20same%20with%20results%20of%20connectivity%20analyser%2C%20but%20still%20Skype%20for%20business%20consult%20and%20transfer%20is%20failing%20for%20one%20of%20our%20client.%20They%20are%20using%20SFB%20Phone%20Numbers%2C%20and%20in%20this%20scenario%20the%20main%20number%20is%20receiving%20call%20from%20external%20user%20and%20then%20a%20consult%20and%20transfer%20from%20main%20number%20to%20an%20internal%20user%20is%20failing%20with%20error%20%22Transfer%20Failed%22%2C%20normal%20blind%20transfer%20works%20fine.%20We%20are%20using%20the%20MS%20recomended%20Yealink%20Phone%20(Yealink%20TS%2048S)%20with%20the%20MS%20approved%20firmware%20on%20it.%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-283448%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-283448%22%20slang%3D%22en-US%22%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F90197%22%20target%3D%22_blank%22%3E%40Petri%20X%3C%2FA%3E%2C%20Skype%20for%20Business%20Online%20should%20sue%20on%20the%20client%20side%20always%20the%20following%20ports%3A%3C%2FP%3E%0A%3CP%3E%3CSPAN%3EAudio%20(UDP%2FTCP)%3A%2050000%20-%2050019%3C%2FSPAN%3E%3CBR%20%2F%3E%3CSPAN%3EVideo%20(UDP%2FTCP)%3A%2050020%20-%2050039%3C%2FSPAN%3E%3CBR%20%2F%3E%3CSPAN%3EDesktop%20Sharing%20(UDP%2FTCP)%3A%2050040%20-%2050059%3C%2FSPAN%3E%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3E%3CSPAN%3EFor%20Skype%20for%20Business%20Server%20you%20can%20configure%20which%20ports%20to%20use.%20I%20would%20recommend%20using%20the%20same%20port%20ranges.%3C%2FSPAN%3E%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3E%3CSPAN%3Ehth%2C%3C%2FSPAN%3E%3C%2FP%3E%0A%3CP%3E%3CSPAN%3Ethomas%3C%2FSPAN%3E%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-283384%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-283384%22%20slang%3D%22en-US%22%3E%3CP%3EWhat%20is%20the%20port%20requirements%20for%20P2P%20calls%3F%3C%2FP%3E%3CP%3EUserA%3A%20OnPrem%20Skype%20user.%3C%2FP%3E%3CP%3EUserB%3A%20Skype%20Online%20user.%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EIn%20case%20UserA%20locates%20in%20site%201%20and%20UserB%20locates%20in%20site%202%20but%20there%20is%20a%20FW%20between%20them.%20How%20we%20could%20allow%20the%20P2P%20calls%20for%20them%3F%20At%20the%20moment%2C%20when%20UserA%20is%20calling%20to%20UserB%20I%20can%20see%20UserB%20gives%2050k%20port%20back%20to%20UserA.%20While%20UserA%20offers%20the%20candidates%20based%20on%20the%20conferecing%20configuration%20on%20the%20on-premises%20Skype.%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EIf%20I%20read%20this%3A%20%3CA%20title%3D%22Skype%20and%20FW%20rules%22%20href%3D%22https%3A%2F%2Fsupport.microsoft.com%2Fen-us%2Fhelp%2F2409256%2Fyou-can-t-connect-to-skype-for-business-online-or-certain-features-don%22%20target%3D%22_self%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EYou%20can't%20connect%20to%20Skype%20for%20Business%20Online%2C%20or%20certain%20features%20don't%20work%2C%20because%20an%20on-premises%20firewall%20blocks%20the%20connection%3C%2FA%3E%20you%20perhaps%20could%20read%20from%20between%20lines%20P2P%20is%20using%3A%3CBR%20%2F%3EAudio%20(UDP%2FTCP)%3A%2050000%20-%2050019%3CBR%20%2F%3EVideo%20(UDP%2FTCP)%3A%2050020%20-%2050039%3CBR%20%2F%3EDesktop%20Sharing%20(UDP%2FTCP)%3A%2050040%20-%2050059%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-265573%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-265573%22%20slang%3D%22en-US%22%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F181391%22%20target%3D%22_blank%22%3E%40Abhinay%20Sharma%3C%2FA%3E%2C%2050%2C000-59%2C999%20UDP%2FTCP%20are%20not%20required%20as%20destination%20ports.%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-264985%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-264985%22%20slang%3D%22en-US%22%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F15786%22%20target%3D%22_blank%22%3E%40Thomas%20Binder%3C%2FA%3E-thanks%20for%20the%20response%20Thomas%2C%20just%20one%20more%20thing%2C%20need%20to%20know%20if%20we%20need%20to%20open%2050%2C000-59%2C999%20(TCP%2FUDP)%26nbsp%3Bas%20destination%20port%3F%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-264950%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-264950%22%20slang%3D%22en-US%22%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F181391%22%20target%3D%22_blank%22%3E%40Abhinay%20Sharma%3C%2FA%3E%2C%20yes%20as%20laid%20out%20in%20the%20table%20above%20you%20need%20for%20TCP%20the%2050%2C000-59%2C999%20as%20source%20--%26nbsp%3Bso%20this%20is%20only%20relevant%20if%20you%20are%20configuring%20source%20ports%20on%20your%20firewall.%20And%20yes%2C%20you%20need%20to%20open%20the%20IPs%20and%20the%20FQDNs.%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-264328%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-264328%22%20slang%3D%22en-US%22%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F15786%22%20target%3D%22_blank%22%3E%40Thomas%20Binder%3C%2FA%3E-%20for%20federation%20between%20skype%20online%20organization%20with%20skype%20on%20premise%20organization%2C%20is%20it%20required%20to%20open%2050000-59999%20ports%3F%26nbsp%3B%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3Eand%20if%20we%20are%20allowing%20all%20office%20365%20ips%20on%20our%20firewall%2C%20do%20we%20also%20need%20to%20allow%20FQDNs%3F%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-259162%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-259162%22%20slang%3D%22en-US%22%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F15786%22%20target%3D%22_blank%22%3E%40Thomas%20Binder%3C%2FA%3E%26nbsp%3BThank%20you%20very%20much%20for%20clarifying.%26nbsp%3B%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-255237%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-255237%22%20slang%3D%22en-US%22%3E%3CP%3E%40Deleted%2C%20no%20need%20to%20change%20the%20QoS%20policy%20as%20they%20client%20ports%20remain%20unchanged.%203478%20UDP%2C%20443%20TCP%20and%2050%2C000-59%2C999%20UDP%2FTCP%26nbsp%3Bare%20referring%20to%20the%20service%20port.%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-255102%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-255102%22%20slang%3D%22en-US%22%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F15786%22%20target%3D%22_blank%22%3E%40Thomas%20Binder%3C%2FA%3E%26nbsp%3Bthank%20you%20for%20the%20feedback.%20I%20was%20wondering%20if%20I%20needed%20to%20update%20the%20group%20policy%20for%20Qos%20to%20use%20the%20new%20ports%3F%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CUL%3E%3CLI%3EAudio%3CUL%3E%3CLI%3EPorts%2050%2C000-50%2C019%20(Source)%3C%2FLI%3E%3CLI%3EDSCP%20marking%20of%2046%3C%2FLI%3E%3C%2FUL%3E%3C%2FLI%3E%3CLI%3EVideo%3CUL%3E%3CLI%3EPorts%2050%2C020-50%2C039%26nbsp%3B(Source)%3C%2FLI%3E%3CLI%3EDSCP%20marking%20of%2034%3C%2FLI%3E%3C%2FUL%3E%3C%2FLI%3E%3CLI%3EFile%20Transfer%3CUL%3E%3CLI%3EPorts%2050%2C040-50%2C059%26nbsp%3B(Source)%3C%2FLI%3E%3CLI%3EDSCP%20marking%20of%2018%3C%2FLI%3E%3C%2FUL%3E%3C%2FLI%3E%3CLI%3EApplication%20Sharing%3CUL%3E%3CLI%3EPorts%2050%2C040-50%2C059%26nbsp%3B(Source)%3C%2FLI%3E%3CLI%3EDSCP%20marking%20of%2018%3C%2FLI%3E%3C%2FUL%3E%3C%2FLI%3E%3C%2FUL%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-254861%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-254861%22%20slang%3D%22en-US%22%3E%3CP%3E%40Deleted%2C%20the%20Skype%20for%20Business%20client%20will%20always%20communicate%20to%20its%20own%20relay%20via%203478%20UDP%20(respectively%20443%20TCP%20if%20using%20TCP)%2C%20however%20when%20talking%20to%20the%20relay%20of%20the%20person%20(or%20conferencing%20server)%20the%20client%20wants%20to%20talk%20to%2C%20it%20will%20still%20leverage%20the%2050%2C000-59%2C999%20UDP%2FTCP%20port%20range%20if%20the%20port%20range%20is%20open.%20If%20the%20port%20range%20is%20closed%2C%20it%20will%20always%20talk%20to%20its%20own%20relay%20via%203478%20UDP%20and%20traffic%20will%20be%20relayed%20from%20there%20to%20either%20directly%20the%20other%20end%20point%20or%20the%20relay%20of%20the%20other%20endpoint.%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3ESummary%3A%20it%20is%20expected%20for%20the%20client%20to%20use%2050%2C000-59%2C999%20UDP%2FTCP%20if%20it%20can.%20If%20it%20can't%20it%20will%20still%20work%20and%20be%20fully%20supported.%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-253956%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-253956%22%20slang%3D%22en-US%22%3E%3CP%3E%26nbsp%3B%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F15786%22%20target%3D%22_blank%22%3E%40Thomas%20Binder%3C%2FA%3E%26nbsp%3BI'm%20performing%20some%20wireshark%20traces%20and%20I%20see%20traffic%20from%20the%20Skype%20for%20business%20online%20service%20coming%20in%20on%20the%20new%20UDP%20ports%20however%20my%20client%20continues%20to%20use%20the%20high%20ports.%20My%20client%20is%20Skype%20for%20Business%202016%20MSO%20(16.0.9029.2106).%20Can%20help%20me%20understand%20what%20would%20be%20preventing%20it%20from%20utilizing%20the%20new%20ports%3F%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EI%20ran%20the%20connectivity%20test%20and%20here%20is%20one%20of%20the%20entries%3A%3C%2FP%3E%3CP%3EStarting%20Connectivity%20checks%3CBR%20%2F%3ERelay%20%3A%2013.107.64.2%20is%20reachable%20using%20Protocol%20UDP%20and%20Port%203478%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-223516%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-223516%22%20slang%3D%22en-US%22%3E%3CP%3EWhen%20you%20have%20a%20company%20which%20does%20not%20allow%20direct%20connections%20through%20the%20external%20FWs%2C%20they%20need%20to%20live%20with%20proxy%20servers.%20Wishing%20to%20see%2C%20that%20Microsoft%20not%20so%20actively%20forgot%20this%20use%20case%20%3A(%3C%2Fimg%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EAlso%2C%20not%20sure%20why%20the%20P2P%20was%20not%20included%20to%20this%20either.%20Corporates%20do%20have%20corporate%20FWs%20between%20the%20clients%20itself.%20So%20allowing%20the%20P2P%20calls%26nbsp%3Bthrough%20the%20FWs%20is%26nbsp%3Ba%20good%20idea%2C%20as%20it%20is%20much%20better%20than%20via%20Proxy%26nbsp%3Bto%20Skype%20Online.%20At%20least%20I%20haven't%20found%20-%20with%20my%20blind%20eyes%20-%20where%20are%20list%20of%20the%20P2P%20ports.%20I%20know%20there%20are%20some%20blog%20articles%20etc.%20but%20the%20official%20document%20I%20have%20not%20found.%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-189633%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-189633%22%20slang%3D%22en-US%22%3E%3CP%3E%26lt%3B%20My%26nbsp%3B%20Question%20is%20specifically%20for%20Skype%20for%20Business%20Enterprise%20-%3CSTRONG%3E%3CEM%3E%26nbsp%3BNOT%3C%2FEM%3E%3C%2FSTRONG%3E%20O365%20%26gt%3B%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EBesides%20the%20IP%20Address%20Ranges%20%26amp%3B%20Port%20Requirements%20for%20SfB-%20that%20we%20need%20to%20be%20sure%20they%20are%20whitelisted%20in%20our%20Firewall%20%26amp%3B%20Proxy%20Servers-%20What%20are%20the%20other%20requirements%20necessary%20to%20be%20considered%3F%3C%2FP%3E%3CP%3EI%20need%20a%20very%20clear%20concise%20answer%2C%20it%20is%20really%20appreciated.%20%5B%26nbsp%3BI%20feel%20like%20a%20loop%20in%20the%20links%20provided%20by%20Microsoft%2C%20they%20are%20just%20pointing%20one%20to%20another.%5D%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EHere%20are%20some%20thoughts%20%26amp%3B%20questions%3A%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E1)%20Is%20there%20any%20checklist%2Froadmap%20or%20action%20plan%20to%20check%20a%20full%20A-Z%20actions%20that%20should%20be%20taken%3F%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3ESomething%20like%20this%3A%20Actions%20to%20take%20to%20be%20sure%20skype%20for%20business%20online%20is%20functioning%20properly%20across%20your%20offices%2C%20branches%2C%20and%20organization%3A%3C%2FP%3E%3CP%3E1)%20check%20ports%26nbsp%3B%3C%2FP%3E%3CP%3E2)%20check%20IP%20ranges%3C%2FP%3E%3CP%3E3)%20FQDN%20and%20IP%20Address%20endpoints%3C%2FP%3E%3CP%3E...%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E2)%20For%20SfB%2C%20do%20we%20need%20to%20whitelist%20FQDNs%20also%20if%20we%20have%20already%20deployed%20and%20whitelisted%20IPV4%2C%20IPV6%20ranges%3F%20or%20it%20is%20a%20redundant%20task%3F%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E3)%20For%20SfB%2C%20do%20we%20need%20to%20add%20PAC%20file%20in%20the%20proxy%20server%20to%20implement%20the%20principles%3F%3C%2FP%3E%3CP%3E%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%26nbsp%3B%20%5B%20same%20as%20what%20advised%20for%20Office%20365%3A%3C%2FP%3E%3CP%3EUse%20our%20%3CA%20href%3D%22https%3A%2F%2Faka.ms%2Fo365proxies%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EPAC%20files%3C%2FA%3E%20to%20implement%20the%20principles%20below.%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EBypass%20your%20proxy%20for%20all%20%3CI%3EFQDN%2FCIDR%3C%2FI%3E%20paired%20and%20%3CI%3ECIDR%20prefix%20only%3C%2FI%3E%20destinations%2C%20such%20as%20row%202%20and%203%20in%20portal%20and%20shared.%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EBypass%20your%20proxy%20or%20remove%20inspection%2C%20authentication%2C%20reputation%20lookup%20services%20for%20any%20%3CI%3EFQDNs%20marked%20required%20without%20a%20CIDR%20prefix%3C%2FI%3E%2C%20such%20as%20row%205%20in%20portal%20and%20shared.%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EFor%20any%20remaining%20optional%20FQDNs%2C%20wildcards%2C%20DNS%2C%20CDN%2C%20CRL%2C%20or%20other%20unpublished%20destinations%20requested%20by%20Office%20365%20services%2C%20ensure%20clients%20can%20access%20them%20over%20the%20Internet.%5D%26nbsp%3B%3C%2FP%3E%3CP%3E4)%20For%20SfB%2C%20do%20we%20need%20to%20a%20reach%20Office%20365%20worldwide%20endpoints%3F%26nbsp%3B%3C%2FP%3E%3CP%3E%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%5B%20same%20as%20what%20advised%20for%20Office%20365%3A%3C%2FP%3E%3CPRE%3E%5B%7B%22instance%22%3A%22O365Worldwide%22%2C%22latest%22%3A%222018033000%22%7D%2C%7B%22instance%22%3A%22O365China%22%2C%22latest%22%3A%222018033000%22%7D%2C%7B%22instance%22%3A%22O365Germany%22%2C%22latest%22%3A%222018033000%22%7D%2C%7B%22instance%22%3A%22O365USGovDoD%22%2C%22latest%22%3A%222018033000%22%7D%2C%7B%22instance%22%3A%22O365USGovGCCHigh%22%2C%22latest%22%3A%222018033000%22%7D%3C%2FPRE%3E%3CP%3E%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%26nbsp%3B%20%5D%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E5)%20any%20other%20extra%20things%20should%20be%20considered%3F%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EThank%20you%20in%20advance%20for%20your%20professional%20advice%2C%20time%2C%20and%20cooperation%2C%3C%2FP%3E%3CP%3EAli%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-184666%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-184666%22%20slang%3D%22en-US%22%3E%3CP%3E%26nbsp%3BThanks%20Thomas%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-184148%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-184148%22%20slang%3D%22en-US%22%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F138948%22%20target%3D%22_blank%22%3E%40Jason%20Jacobs%3C%2FA%3E%2C%20while%20we%20highly%20recommend%20to%20stay%20always%20up%20to%20date%20on%20our%20latest%20clients%20(for%20various%20improvements)%2C%20there%20are%20no%20minimum%20version%20requirements%20for%20the%20new%20ports.%20Lync%202010%20clients%20will%20not%20support%20the%20new%20ports%20at%20all%2C%20but%20they%20will%20just%20continue%20to%20leverage%20the%20existing%20ports.%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3Ehth%2C%3C%2FP%3E%0A%3CP%3Ethomas%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-184052%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-184052%22%20slang%3D%22en-US%22%3E%3CP%3EHi%26nbsp%3B%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F15786%22%20target%3D%22_blank%22%3E%40Thomas%20Binder%3C%2FA%3E%3C%2FP%3E%3CP%3EThanks%20for%20the%20article.%3C%2FP%3E%3CP%3EDo%20you%20know%20of%20any%20client%2Fendpoint%20requirements%20in%20order%20to%20make%20use%20of%20these%20new%20ports%3F%3C%2FP%3E%3CP%3EIn%20other%20words%2C%20will%20we%20need%20to%20update%20our%20SfB%20PC%20clients%2C%20or%20Polycom%20endpoint%2Froom%20devices%20firmware%20to%20use%20these%20ports%3F%3C%2FP%3E%3CP%3EI'm%20guessing%20these%20ports%20will%20be%20offered%20during%20the%20call%20setup%20and%20negotiated%3F%3C%2FP%3E%3CP%3ECheers%2C%20Jason%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-183772%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-183772%22%20slang%3D%22en-US%22%3E%3CP%3Eif%20there%20is%20any%20automate%20way%20to%20update%20the%20IP%20address%20instead%20of%20manual%20entry%20in%20the%20firewall%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-182530%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-182530%22%20slang%3D%22en-US%22%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F64483%22%20target%3D%22_blank%22%3E%40Christian%20Schindler%3C%2FA%3E%2C%20%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F40284%22%20target%3D%22_blank%22%3E%40Sankarasubramanian%20Parameswaran%3C%2FA%3E%2C%20DNS%20based%20rules%20would%20not%20work%20as%20not%20all%20of%20the%20IPs%20are%20mapped%20to%20DNS%20entries.%20You%20need%20to%20allow%20all%20the%20IP%20ranges%20and%20all%20the%20FQDNs.%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-182228%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-182228%22%20slang%3D%22en-US%22%3E%3CP%3Ewe%20have%20allowed%20*lync.com%20with%20the%20port%20numbers%203478-3481%20and%20when%20we%20ran%20Skype%20network%20assestment%20tool%20it%20shows%20blocked.%20Not%20sure%20why.%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-182216%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-182216%22%20slang%3D%22en-US%22%3E%3CP%3EIn%20an%20optimal%20Scenario%20your%20Firewall%20can%20handle%20DNS%20based%20rules.%20Then%20you%20don't%20need%20to%20change%20IP%20Ranges%20monthly...%20This%20is%20an%20area%20were%20FW%20vendors%20definiteley%20need%20to%20improve...%20Christian%26nbsp%3B%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-182201%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-182201%22%20slang%3D%22en-US%22%3E%3CP%3EExcel%20could%20be%26nbsp%3Bone%20option.%20Use%20%3CSTRONG%3EVLOOKUP%26nbsp%3B%3C%2FSTRONG%3Emaybe%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-182200%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-182200%22%20slang%3D%22en-US%22%3E%3CP%3Ewhether%20it%20is%20applicable%20to%20Team%20%3F%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-182195%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-182195%22%20slang%3D%22en-US%22%3E%3CP%3Ehow%20we%20will%20compare%20the%20existing%20Ip%20address%20allowed%20and%20what%20is%20missed.%26nbsp%3B%20Whether%20we%20compare%20with%20excel%20or%20any%20other%20tool%20help%20us%20to%20validate%20this%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-182159%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-182159%22%20slang%3D%22en-US%22%3E%3CP%3EIf%20it%20is%20for%20Skype%20for%20business.%20here%20is%20the%20IPs%3A%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CTABLE%3E%3CTBODY%3E%3CTR%3E%3CTD%3E%3CP%3E13.67.180.128%2F32%3C%2FP%3E%3CP%3E13.70.151.216%2F32%3C%2FP%3E%3CP%3E13.71.127.197%2F32%3C%2FP%3E%3CP%3E13.75.126.169%2F32%3C%2FP%3E%3CP%3E13.72.245.115%2F32%3C%2FP%3E%3CP%3E13.73.1.120%2F32%3C%2FP%3E%3CP%3E13.76.241.210%2F32%3C%2FP%3E%3CP%3E13.78.94.7%2F32%3C%2FP%3E%3CP%3E13.79.153.60%2F32%3C%2FP%3E%3CP%3E13.91.252.242%2F32%3C%2FP%3E%3CP%3E13.93.167.93%2F32%3C%2FP%3E%3CP%3E13.95.234.10%2F32%3C%2FP%3E%3CP%3E13.107.3.0%2F24%3C%2FP%3E%3CP%3E13.107.8.0%2F24%3C%2FP%3E%3CP%3E13.107.64.0%2F18%3C%2FP%3E%3CP%3E23.97.78.16%2F32%3C%2FP%3E%3CP%3E23.99.101.118%2F32%3C%2FP%3E%3CP%3E23.99.112.73%2F32%3C%2FP%3E%3CP%3E23.99.113.163%2F32%3C%2FP%3E%3CP%3E23.99.121.38%2F32%3C%2FP%3E%3CP%3E23.101.61.176%2F32%3C%2FP%3E%3CP%3E23.101.112.170%2F32%3C%2FP%3E%3CP%3E23.101.151.89%2F32%3C%2FP%3E%3CP%3E23.103.176.128%2F26%3C%2FP%3E%3CP%3E23.103.176.192%2F27%3C%2FP%3E%3CP%3E23.103.178.128%2F26%3C%2FP%3E%3CP%3E23.103.178.192%2F27%3C%2FP%3E%3CP%3E40.69.45.108%2F32%3C%2FP%3E%3CP%3E40.74.62.125%2F32%3C%2FP%3E%3CP%3E40.76.77.68%2F32%3C%2FP%3E%3CP%3E40.78.98.202%2F32%3C%2FP%3E%3CP%3E40.78.146.128%2F32%3C%2FP%3E%3CP%3E40.83.17.24%2F32%3C%2FP%3E%3CP%3E40.83.124.144%2F32%3C%2FP%3E%3CP%3E40.84.28.125%2F32%3C%2FP%3E%3CP%3E40.115.1.44%2F32%3C%2FP%3E%3CP%3E40.117.145.132%2F32%3C%2FP%3E%3CP%3E40.121.200.212%2F32%3C%2FP%3E%3CP%3E40.122.44.96%2F32%3C%2FP%3E%3CP%3E40.123.43.195%2F32%3C%2FP%3E%3CP%3E40.127.129.109%2F32%3C%2FP%3E%3CP%3E40.127.169.165%2F32%3C%2FP%3E%3CP%3E51.140.62.120%2F32%3C%2FP%3E%3CP%3E51.140.79.167%2F32%3C%2FP%3E%3CP%3E51.140.126.38%2F32%3C%2FP%3E%3CP%3E51.140.155.234%2F32%3C%2FP%3E%3CP%3E51.141.28.50%2F32%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E51.141.42.151%2F32%3C%2FP%3E%3CP%3E51.141.49.0%2F32%3C%2FP%3E%3CP%3E51.141.51.76%2F32%3C%2FP%3E%3CP%3E52.112.0.0%2F14%3C%2FP%3E%3CP%3E52.163.60.30%2F32%3C%2FP%3E%3CP%3E52.163.126.215%2F32%3C%2FP%3E%3CP%3E52.163.225.1%2F32%3C%2FP%3E%3CP%3E52.165.150.215%2F32%3C%2FP%3E%3CP%3E52.165.238.202%2F32%3C%2FP%3E%3CP%3E52.166.61.83%2F32%3C%2FP%3E%3CP%3E52.169.154.144%2F32%3C%2FP%3E%3CP%3E52.170.21.67%2F32%3C%2FP%3E%3CP%3E52.172.185.18%2F32%3C%2FP%3E%3CP%3E52.173.190.229%2F32%3C%2FP%3E%3CP%3E52.175.37.105%2F32%3C%2FP%3E%3CP%3E52.177.200.188%2F32%3C%2FP%3E%3CP%3E52.178.94.2%2F32%3C%2FP%3E%3CP%3E52.178.161.139%2F32%3C%2FP%3E%3CP%3E52.178.179.194%2F32%3C%2FP%3E%3CP%3E52.178.198.107%2F32%3C%2FP%3E%3CP%3E52.187.6.119%2F32%3C%2FP%3E%3CP%3E52.187.79.90%2F32%3C%2FP%3E%3CP%3E52.228.25.96%2F32%3C%2FP%3E%3CP%3E52.231.36.175%2F32%3C%2FP%3E%3CP%3E52.231.207.185%2F32%3C%2FP%3E%3CP%3E52.233.128.227%2F32%3C%2FP%3E%3CP%3E52.238.119.141%2F32%3C%2FP%3E%3CP%3E52.242.23.189%2F32%3C%2FP%3E%3CP%3E52.244.160.207%2F32%3C%2FP%3E%3CP%3E104.41.208.54%2F32%3C%2FP%3E%3CP%3E104.44.195.0%2F24%3C%2FP%3E%3CP%3E104.44.200.0%2F23%3C%2FP%3E%3CP%3E104.45.18.178%2F32%3C%2FP%3E%3CP%3E104.45.231.95%2F32%3C%2FP%3E%3CP%3E104.46.62.41%2F32%3C%2FP%3E%3CP%3E104.47.151.128%2F32%3C%2FP%3E%3CP%3E104.208.28.54%2F32%3C%2FP%3E%3CP%3E104.209.188.207%2F32%3C%2FP%3E%3CP%3E104.210.9.95%2F32%3C%2FP%3E%3CP%3E104.215.62.195%2F32%3C%2FP%3E%3CP%3E137.116.66.252%2F32%3C%2FP%3E%3CP%3E137.116.248.105%2F32%3C%2FP%3E%3CP%3E137.117.128.25%2F32%3C%2FP%3E%3CP%3E138.91.237.237%2F32%3C%2FP%3E%3CP%3E168.61.145.101%2F32%3C%2FP%3E%3CP%3E168.63.204.74%2F32%3C%2FP%3E%3CP%3E168.63.245.120%2F32%3C%2FP%3E%3C%2FTD%3E%3C%2FTR%3E%3C%2FTBODY%3E%3C%2FTABLE%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EMain%20Link%3A%20%3CA%20href%3D%22https%3A%2F%2Fsupport.office.com%2Fen-us%2Farticle%2FOffice-365-URLs-and-IP-address-ranges-8548a211-3fe7-47cb-abb1-355ea5aa88a2%23bkmk_lyo%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EHere%3C%2FA%3E%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-182150%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-182150%22%20slang%3D%22en-US%22%3E%3CP%3E%26nbsp%3BWe%20have%20allowed%20some%20Ip%20address%20in%20our%20firewall%20but%20not%20sure%20we%20allowed%20all%20the%20IP%20address.%20How%20we%20can%20validate%20the%20missing%20Ip%20address%20and%20update%20accordingly.%20Do%20you%20have%20any%20tool%20to%20check%20this%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-182148%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-182148%22%20slang%3D%22en-US%22%3E%3CP%3EThank%20you%20Thomas%20for%20reaching%20out.%3C%2FP%3E%3CP%3E%3CBR%20%2F%3EThat%20would%20be%20great%20if%20this%20could%20be%20done%20in%20a%20dynamic%20way.%20It%20would%20be%20hard%20for%20Enterprises%20to%20make%20these%20changes%20manually.%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CBLOCKQUOTE%3E%3CHR%20%2F%3E%26nbsp%3Bwrote%3A%3CBR%20%2F%3E%3CP%3E%3CEM%3ENote%3A%20This%20article%20applies%20only%20to%26nbsp%3BOffice%20365%20Worldwide%20(including%20Government%20Community%20Cloud).%20For%20guidance%20on%26nbsp%3B%3CA%20href%3D%22https%3A%2F%2Fsupport.office.com%2Fen-gb%2Farticle%2FOffice-365-operated-by-21-Vianet-5c47c07d-f9b6-4b78-a329-bfdc1b6da7a0%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EOffice%20365%20operated%20by%2021%20Vianet%2C%20%3C%2FA%3E%3CA%20href%3D%22https%3A%2F%2Fsupport.office.com%2Fen-gb%2Farticle%2FOffice-365-Germany-8a113a50-0071-4155-bb8e-eba5a8dbd4c8%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EOffice%20365%20Germany%2C%20%3C%2FA%3E%3CA%20href%3D%22https%3A%2F%2Fsupport.office.com%2Fen-gb%2Farticle%2FOffice-365-US-Government-DoD-5d7dce60-4892-4b58-b45e-ee42fe8a907f%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EOffice%20365%20U.S.%20Government%20DoD%20or%20%3C%2FA%3E%3CA%20href%3D%22https%3A%2F%2Fsupport.office.com%2Fen-gb%2Farticle%2FOffice-365-US-Government-GCC-High-cbd2369c-fd96-464c-bf48-c99826b459ee%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EOffice%20365%20U.S.%20Government%20GCC%20High%20click%20on%20the%20respective%20links.%3C%2FA%3E%3C%2FEM%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSPAN%3EWe%20are%20happy%20to%20announce%20that%20the%2050%2C000-59%2C999%20port%20range%20(UDP%20and%20TCP)%20is%20no%20longer%20a%20requirement%20for%20Skype%20for%20Business%20endpoints%20to%20communicate%20with%20Skype%20for%20Business%20Online.%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%3CSPAN%3EEarlier%20this%20year%20we%20talked%20about%20making%20simplification%20for%20network%20connectivity%20for%20Skype%20for%20Business%20Online%20(see%20blog%20article%20%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2FSkype-for-Business-Blog%2FUpdated-IP-ranges-and-ports-for-Skype-for-Business-Online%2Fba-p%2F47470%22%20target%3D%22_blank%22%3Ehere)%20and%20we%20recently%20updated%20our%20guidance%20and%20removed%20the%20mentioned%20port%20range%20as%20a%20requirement%3A%20%3C%2FA%3E%3CA%20href%3D%22https%3A%2F%2Fsupport.office.com%2Fen-us%2Farticle%2FOffice-365-URLs-and-IP-address-ranges-8548a211-3fe7-47cb-abb1-355ea5aa88a2%3Fui%3Den-US%26amp%3Brs%3Den-US%26amp%3Bad%3DUS%26amp%3BfromAR%3D1%23bkmk_lyo%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EOffice%20365%20URLs%20and%20IP%20address%20ranges%3C%2FA%3E%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSTRONG%3ESo%20which%20ports%20are%20required%20for%20clients%3F%3C%2FSTRONG%3E%3C%2FP%3E%3CP%3E%3CSPAN%3EAll%20clients%20need%20to%20be%20able%20to%20directly%20connect%20to%20Skype%20for%20Business%20Online%20on%20the%20following%20destination%20ports%3A%20(the%20IP%20addresses%20and%20FQDNs%20can%20be%20found%20in%20the%20%3CA%20href%3D%22https%3A%2F%2Fsupport.office.com%2Fen-us%2Farticle%2FOffice-365-URLs-and-IP-address-ranges-8548a211-3fe7-47cb-abb1-355ea5aa88a2%3Fui%3Den-US%26amp%3Brs%3Den-US%26amp%3Bad%3DUS%26amp%3BfromAR%3D1%23bkmk_lyo%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EOffice%20365%20URLs%20and%20IP%20address%20ranges)%3C%2FA%3E%3C%2FSPAN%3E%3C%2FP%3E%3CUL%3E%3CLI%3E%3CSPAN%3ETCP%2080%2C%20443%3C%2FSPAN%3E%3C%2FLI%3E%3CLI%3E%3CSPAN%3EUDP%203478%2C%203479%2C%203480%2C%203481%3C%2FSPAN%3E%3C%2FLI%3E%3CLI%3E%3CSPAN%3E%3CSPAN%3EOptional%3A%20UDP%2FTCP%2050%2C000-59%2C999%3C%2FSPAN%3E%3C%2FSPAN%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSTRONG%3EIs%20there%20a%20minimum%20client%20version%20required%20to%20benefit%20from%20the%20port%20changes%3F%3C%2FSTRONG%3E%3C%2FP%3E%3CP%3E%3CSPAN%3EThis%20change%20applies%20to%20all%20clients%20supported%20against%20Skype%20for%20Business%20Online.%20No%20clients%20are%20excluded%20and%20there%20are%20no%20specific%20minimum%20version%20required%20(although%20we%20always%20recommend%20to%20run%20the%20latest%20version).%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSTRONG%3EWhy%20are%20these%20ports%20not%20required%20anymore%3F%3C%2FSTRONG%3E%3C%2FP%3E%3CP%3E%3CSPAN%3ETo%20answer%20this%20question%2C%20it%20is%20important%20to%20understand%20first%20how%20the%2050%2C000-59%2C999%20ports%20were%20used%20in%20the%20first%20place.%20(To%20understand%20all%20the%20details%20of%20their%20purpose%2C%20we%20recommend%20watching%20%3CA%20href%3D%22http%3A%2F%2Faka.ms%2Fsa-ice%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3ETroubleshoot%20media%20flows%20in%20Skype%20for%20Business%20across%20online%2C%20server%20and%20hybrid.)%3C%2FA%3E%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%3CSPAN%3ELet's%20have%20the%20following%20example%3A%3C%2FSPAN%3E%3C%2FP%3E%3CUL%3E%3CLI%3E%3CSPAN%3EUser%20A%20wants%20to%20call%20User%20B%3C%2FSPAN%3E%3C%2FLI%3E%3CLI%3E%3CSPAN%3EFor%20the%20sake%20of%20the%20example%2C%20the%20direct%20connection%20between%20User%20A%20and%20User%20B%20is%20blocked%20(e.g.%20User%20and%20User%20B%20are%20at%20different%20branch%20offices%20behind%20firewalls)%2C%20so%20the%20media%20traffic%20cannot%20go%20directly%20peer%20to%20peer%20and%20needs%20to%20flow%20via%20Skype%20for%20Business%20Online%3C%2FSPAN%3E%3C%2FLI%3E%3CLI%3E%3CSPAN%3E%3CSPAN%3EThere%20are%20now%20the%20following%20possible%20media%20paths%3C%2FSPAN%3E%3C%2FSPAN%3E%3CUL%3E%3CLI%3E%3CSPAN%3EThe%2050%2C000-59%2C999%20port%20range%20can%20be%20leveraged%20to%20include%20only%20a%20single%20Relay%20Server%20in%20the%20media%20path%3C%2FSPAN%3E%3C%2FLI%3E%3CLI%3E%3CSPAN%3E%3CSPAN%3EWithout%20the%2050%2C000-59%2C999%20port%20range%2C%20the%20traffic%20needs%20to%20travel%20via%20two%20Relay%20Server.%3C%2FSPAN%3E%3C%2FSPAN%3E%3CP%3E%3CSPAN%3EAs%20you%20can%20see%2C%20closing%20the%2050%2C000-59%2C999%20port%20range%20will%20force%20the%20traffic%20to%20travel%20via%20an%20additional%20hop.%20While%20logic%20tells%20us%20that%20usually%20we%20want%20to%20avoid%20additional%20hops%20under%20all%20circumstances%2C%20the%20analysis%20on%20call%20quality%20data%20has%20shown%20us%2C%20that%20this%20additional%20hop%20does%20not%20significantly%20affect%20call%20quality%20-%20since%20both%20these%20Relay%20Servers%20are%20homed%20on%20the%20Microsoft%20Network%2C%20all%20traffic%20between%20the%20Relay%20Servers%20is%20sent%20over%20a%20highly%20reliable%20pipe%20designed%20for%20real-time%20communication.%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSTRONG%3EOur%20organization%20has%20these%20ports%20open%2C%20should%20we%20close%20them%3F%3C%2FSTRONG%3E%3C%2FP%3E%3CP%3E%3CSPAN%3EHaving%20the%2050%2C000-59%2C999%20port%20range%20open%20can%20still%20have%20(some)%20benefits%20when%20it%20comes%20to%20call%20setup%20times%20and%20under%20some%20circumstances%20on%20call%20quality.%20However%20in%20our%20data%20analysis%20and%20pilot%20deployments%20with%20some%20customers%20these%20differences%20did%20not%20show%20significance.%20If%20you%20have%20the%20ports%20open%20today%2C%20it%20makes%20sense%20to%20leave%20them%20open.%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSTRONG%3EWhat%20does%20this%20change%20for%20hybrid%20between%20Skype%20for%20Business%20Server%20and%20Skype%20for%20Business%20Online%3F%3C%2FSTRONG%3E%3C%2FP%3E%3CP%3E%3CSPAN%3EThis%20change%20only%20applies%20to%20users%20who%20are%20homed%20in%20Skype%20for%20Business%20Online.%20If%20you%20have%20an%20on-premises%20deployment%20of%20Skype%20for%20Business%2C%20the%20requirements%20for%20your%20Edge%20Server%20to%20communicate%20to%20Skype%20for%20Business%20Online%20remain%20unchanged%20(and%20also%20for%20any%20Federation%20scenarios%20including%20Skype%20for%20Business%20on-premises).%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%3CSPAN%3EThe%20A%2FV%20Edge%20Server%20in%20your%20environment%20will%20need%20to%20be%20configured%20liked%20this.%20Please%20note%20that%20the%20Source%20Port%20is%20only%20relevant%2C%20if%20your%20firewall%20requires%20a%20source%20port%20to%20be%20specified%20(and%20a%20lot%20of%20firewalls%20do%20not%20require%20this%20setting)%3A%3C%2FSPAN%3E%3C%2FP%3E%3CTABLE%20border%3D%222%22%3E%3CTBODY%3E%3CTR%3E%3CTD%3E%3CP%3E%3CSPAN%3ESource%20IP%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3EDestination%20IP%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3ESource%20Port%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3EDestination%20Port%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3C%2FTR%3E%3CTR%3E%3CTD%3E%3CP%3E%3CSPAN%3EA%2FV%20Edge%20service%20interface%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3EAny%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3EUDP%203478%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3EUDP%203478%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3C%2FTR%3E%3CTR%3E%3CTD%3E%3CP%3E%3CSPAN%3EA%2FV%20Edge%20service%20interface%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3EAny%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3ETCP%2050%2C000-59%2C999%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3ETCP%20443%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3C%2FTR%3E%3CTR%3E%3CTD%3E%3CP%3EAny%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3EA%2FV%20Edge%20service%20interface%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3EAny%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3EUDP%203478%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3C%2FTR%3E%3CTR%3E%3CTD%3E%3CP%3EAny%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3EA%2FV%20Edge%20service%20interface%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3EAny%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3ETCP%20443%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%3CSPAN%3E%26nbsp%3B%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%3CSPAN%3EFull%20requirements%20for%20Skype%20for%20Business%20Edge%20Server%20can%20be%20found%20here%3A%20%3CA%20href%3D%22https%3A%2F%2Ftechnet.microsoft.com%2Fen-us%2Flibrary%2Fmt346415.aspx%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EEdge%20Server%20environmental%20requirements%20in%20Skype%20for%20Business%20Server%202015.%3C%2FA%3E%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSTRONG%3EDoes%20this%20change%20anything%20for%20Cloud%20Connector%20Edition%3F%3C%2FSTRONG%3E%3C%2FP%3E%3CP%3E%3CSPAN%3ENo%2C%20the%20requirements%20for%20Cloud%20Connector%20Edition%20(see%20%3CA%20href%3D%22https%3A%2F%2Ftechnet.microsoft.com%2FEN-US%2Flibrary%2Fmt605227.aspx%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EPlan%20for%20Skype%20for%20Business%20Cloud%20Connector%20Edition)%20remain%20unchanged.%3C%2FA%3E%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSTRONG%3ECall%20to%20Action%3C%2FSTRONG%3E%3C%2FP%3E%3COL%3E%3CLI%3E%3CSPAN%3ECelebrate%20about%20the%20simplified%20port%20requirements%3C%2FSPAN%3E%3C%2FLI%3E%3CLI%3E%3CSPAN%3EUpdate%20any%20design%20templates%20you%20might%20have%3C%2FSPAN%3E%3C%2FLI%3E%3CLI%3E%3CSPAN%3E%3CSPAN%3EFor%20future%20deployments%2C%20open%20only%20TCP%2080%2C%20443%20and%20UDP%203478%2C%203479%2C%203480%2C%203481%20per%20new%20guideline%20(and%2C%20optionally%2C%2050%2C000-59%2C999%20UDP%20and%20TCP)%3C%2FSPAN%3E%3C%2FSPAN%3E%3CP%3EIf%20you%20have%20any%20questions%20or%20comments%2C%20please%20let%20us%20know%20in%20the%20%3CA%20href%3D%22http%3A%2F%2Faka.ms%2Fsofcommunity%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3Ecommunity%3C%2FA%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CEM%3EThis%20post%20is%20brought%20to%20you%20by%20%3CA%20href%3D%22http%3A%2F%2Faka.ms%2Fskypeacademy%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3ESkype%20Academy.%20Visit%20Skype%20Academy%20for%20technical%20trainings%20and%20readiness%20around%20the%20Skype%20Operations%20Framework.%3C%2FA%3E%3C%2FEM%3E%3C%2FP%3E%3CHR%20%2F%3E%3CBLOCKQUOTE%3E%3CHR%20%2F%3E%26nbsp%3Bwrote%3A%3CBR%20%2F%3E%3CP%3E%3CEM%3ENote%3A%20This%20article%20applies%20only%20to%26nbsp%3BOffice%20365%20Worldwide%20(including%20Government%20Community%20Cloud).%20For%20guidance%20on%26nbsp%3B%3CA%20href%3D%22https%3A%2F%2Fsupport.office.com%2Fen-gb%2Farticle%2FOffice-365-operated-by-21-Vianet-5c47c07d-f9b6-4b78-a329-bfdc1b6da7a0%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EOffice%20365%20operated%20by%2021%20Vianet%2C%20%3C%2FA%3E%3CA%20href%3D%22https%3A%2F%2Fsupport.office.com%2Fen-gb%2Farticle%2FOffice-365-Germany-8a113a50-0071-4155-bb8e-eba5a8dbd4c8%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EOffice%20365%20Germany%2C%20%3C%2FA%3E%3CA%20href%3D%22https%3A%2F%2Fsupport.office.com%2Fen-gb%2Farticle%2FOffice-365-US-Government-DoD-5d7dce60-4892-4b58-b45e-ee42fe8a907f%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EOffice%20365%20U.S.%20Government%20DoD%20or%20%3C%2FA%3E%3CA%20href%3D%22https%3A%2F%2Fsupport.office.com%2Fen-gb%2Farticle%2FOffice-365-US-Government-GCC-High-cbd2369c-fd96-464c-bf48-c99826b459ee%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EOffice%20365%20U.S.%20Government%20GCC%20High%20click%20on%20the%20respective%20links.%3C%2FA%3E%3C%2FEM%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSPAN%3EWe%20are%20happy%20to%20announce%20that%20the%2050%2C000-59%2C999%20port%20range%20(UDP%20and%20TCP)%20is%20no%20longer%20a%20requirement%20for%20Skype%20for%20Business%20endpoints%20to%20communicate%20with%20Skype%20for%20Business%20Online.%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%3CSPAN%3EEarlier%20this%20year%20we%20talked%20about%20making%20simplification%20for%20network%20connectivity%20for%20Skype%20for%20Business%20Online%20(see%20blog%20article%20%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2FSkype-for-Business-Blog%2FUpdated-IP-ranges-and-ports-for-Skype-for-Business-Online%2Fba-p%2F47470%22%20target%3D%22_blank%22%3Ehere)%20and%20we%20recently%20updated%20our%20guidance%20and%20removed%20the%20mentioned%20port%20range%20as%20a%20requirement%3A%20%3C%2FA%3E%3CA%20href%3D%22https%3A%2F%2Fsupport.office.com%2Fen-us%2Farticle%2FOffice-365-URLs-and-IP-address-ranges-8548a211-3fe7-47cb-abb1-355ea5aa88a2%3Fui%3Den-US%26amp%3Brs%3Den-US%26amp%3Bad%3DUS%26amp%3BfromAR%3D1%23bkmk_lyo%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EOffice%20365%20URLs%20and%20IP%20address%20ranges%3C%2FA%3E%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSTRONG%3ESo%20which%20ports%20are%20required%20for%20clients%3F%3C%2FSTRONG%3E%3C%2FP%3E%3CP%3E%3CSPAN%3EAll%20clients%20need%20to%20be%20able%20to%20directly%20connect%20to%20Skype%20for%20Business%20Online%20on%20the%20following%20destination%20ports%3A%20(the%20IP%20addresses%20and%20FQDNs%20can%20be%20found%20in%20the%20%3CA%20href%3D%22https%3A%2F%2Fsupport.office.com%2Fen-us%2Farticle%2FOffice-365-URLs-and-IP-address-ranges-8548a211-3fe7-47cb-abb1-355ea5aa88a2%3Fui%3Den-US%26amp%3Brs%3Den-US%26amp%3Bad%3DUS%26amp%3BfromAR%3D1%23bkmk_lyo%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EOffice%20365%20URLs%20and%20IP%20address%20ranges)%3C%2FA%3E%3C%2FSPAN%3E%3C%2FP%3E%3CUL%3E%3CLI%3E%3CSPAN%3ETCP%2080%2C%20443%3C%2FSPAN%3E%3C%2FLI%3E%3CLI%3E%3CSPAN%3EUDP%203478%2C%203479%2C%203480%2C%203481%3C%2FSPAN%3E%3C%2FLI%3E%3CLI%3E%3CSPAN%3E%3CSPAN%3EOptional%3A%20UDP%2FTCP%2050%2C000-59%2C999%3C%2FSPAN%3E%3C%2FSPAN%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSTRONG%3EIs%20there%20a%20minimum%20client%20version%20required%20to%20benefit%20from%20the%20port%20changes%3F%3C%2FSTRONG%3E%3C%2FP%3E%3CP%3E%3CSPAN%3EThis%20change%20applies%20to%20all%20clients%20supported%20against%20Skype%20for%20Business%20Online.%20No%20clients%20are%20excluded%20and%20there%20are%20no%20specific%20minimum%20version%20required%20(although%20we%20always%20recommend%20to%20run%20the%20latest%20version).%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSTRONG%3EWhy%20are%20these%20ports%20not%20required%20anymore%3F%3C%2FSTRONG%3E%3C%2FP%3E%3CP%3E%3CSPAN%3ETo%20answer%20this%20question%2C%20it%20is%20important%20to%20understand%20first%20how%20the%2050%2C000-59%2C999%20ports%20were%20used%20in%20the%20first%20place.%20(To%20understand%20all%20the%20details%20of%20their%20purpose%2C%20we%20recommend%20watching%20%3CA%20href%3D%22http%3A%2F%2Faka.ms%2Fsa-ice%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3ETroubleshoot%20media%20flows%20in%20Skype%20for%20Business%20across%20online%2C%20server%20and%20hybrid.)%3C%2FA%3E%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%3CSPAN%3ELet's%20have%20the%20following%20example%3A%3C%2FSPAN%3E%3C%2FP%3E%3CUL%3E%3CLI%3E%3CSPAN%3EUser%20A%20wants%20to%20call%20User%20B%3C%2FSPAN%3E%3C%2FLI%3E%3CLI%3E%3CSPAN%3EFor%20the%20sake%20of%20the%20example%2C%20the%20direct%20connection%20between%20User%20A%20and%20User%20B%20is%20blocked%20(e.g.%20User%20and%20User%20B%20are%20at%20different%20branch%20offices%20behind%20firewalls)%2C%20so%20the%20media%20traffic%20cannot%20go%20directly%20peer%20to%20peer%20and%20needs%20to%20flow%20via%20Skype%20for%20Business%20Online%3C%2FSPAN%3E%3C%2FLI%3E%3CLI%3E%3CSPAN%3E%3CSPAN%3EThere%20are%20now%20the%20following%20possible%20media%20paths%3C%2FSPAN%3E%3C%2FSPAN%3E%3CUL%3E%3CLI%3E%3CSPAN%3EThe%2050%2C000-59%2C999%20port%20range%20can%20be%20leveraged%20to%20include%20only%20a%20single%20Relay%20Server%20in%20the%20media%20path%3C%2FSPAN%3E%3C%2FLI%3E%3CLI%3E%3CSPAN%3E%3CSPAN%3EWithout%20the%2050%2C000-59%2C999%20port%20range%2C%20the%20traffic%20needs%20to%20travel%20via%20two%20Relay%20Server.%3C%2FSPAN%3E%3C%2FSPAN%3E%3CP%3E%3CSPAN%3EAs%20you%20can%20see%2C%20closing%20the%2050%2C000-59%2C999%20port%20range%20will%20force%20the%20traffic%20to%20travel%20via%20an%20additional%20hop.%20While%20logic%20tells%20us%20that%20usually%20we%20want%20to%20avoid%20additional%20hops%20under%20all%20circumstances%2C%20the%20analysis%20on%20call%20quality%20data%20has%20shown%20us%2C%20that%20this%20additional%20hop%20does%20not%20significantly%20affect%20call%20quality%20-%20since%20both%20these%20Relay%20Servers%20are%20homed%20on%20the%20Microsoft%20Network%2C%20all%20traffic%20between%20the%20Relay%20Servers%20is%20sent%20over%20a%20highly%20reliable%20pipe%20designed%20for%20real-time%20communication.%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSTRONG%3EOur%20organization%20has%20these%20ports%20open%2C%20should%20we%20close%20them%3F%3C%2FSTRONG%3E%3C%2FP%3E%3CP%3E%3CSPAN%3EHaving%20the%2050%2C000-59%2C999%20port%20range%20open%20can%20still%20have%20(some)%20benefits%20when%20it%20comes%20to%20call%20setup%20times%20and%20under%20some%20circumstances%20on%20call%20quality.%20However%20in%20our%20data%20analysis%20and%20pilot%20deployments%20with%20some%20customers%20these%20differences%20did%20not%20show%20significance.%20If%20you%20have%20the%20ports%20open%20today%2C%20it%20makes%20sense%20to%20leave%20them%20open.%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSTRONG%3EWhat%20does%20this%20change%20for%20hybrid%20between%20Skype%20for%20Business%20Server%20and%20Skype%20for%20Business%20Online%3F%3C%2FSTRONG%3E%3C%2FP%3E%3CP%3E%3CSPAN%3EThis%20change%20only%20applies%20to%20users%20who%20are%20homed%20in%20Skype%20for%20Business%20Online.%20If%20you%20have%20an%20on-premises%20deployment%20of%20Skype%20for%20Business%2C%20the%20requirements%20for%20your%20Edge%20Server%20to%20communicate%20to%20Skype%20for%20Business%20Online%20remain%20unchanged%20(and%20also%20for%20any%20Federation%20scenarios%20including%20Skype%20for%20Business%20on-premises).%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%3CSPAN%3EThe%20A%2FV%20Edge%20Server%20in%20your%20environment%20will%20need%20to%20be%20configured%20liked%20this.%20Please%20note%20that%20the%20Source%20Port%20is%20only%20relevant%2C%20if%20your%20firewall%20requires%20a%20source%20port%20to%20be%20specified%20(and%20a%20lot%20of%20firewalls%20do%20not%20require%20this%20setting)%3A%3C%2FSPAN%3E%3C%2FP%3E%3CTABLE%20border%3D%222%22%3E%3CTBODY%3E%3CTR%3E%3CTD%3E%3CP%3E%3CSPAN%3ESource%20IP%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3EDestination%20IP%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3ESource%20Port%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3EDestination%20Port%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3C%2FTR%3E%3CTR%3E%3CTD%3E%3CP%3E%3CSPAN%3EA%2FV%20Edge%20service%20interface%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3EAny%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3EUDP%203478%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3EUDP%203478%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3C%2FTR%3E%3CTR%3E%3CTD%3E%3CP%3E%3CSPAN%3EA%2FV%20Edge%20service%20interface%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3EAny%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3ETCP%2050%2C000-59%2C999%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3ETCP%20443%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3C%2FTR%3E%3CTR%3E%3CTD%3E%3CP%3EAny%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3EA%2FV%20Edge%20service%20interface%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3EAny%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3EUDP%203478%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3C%2FTR%3E%3CTR%3E%3CTD%3E%3CP%3EAny%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3EA%2FV%20Edge%20service%20interface%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3EAny%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3ETCP%20443%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%3CSPAN%3E%26nbsp%3B%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%3CSPAN%3EFull%20requirements%20for%20Skype%20for%20Business%20Edge%20Server%20can%20be%20found%20here%3A%20%3CA%20href%3D%22https%3A%2F%2Ftechnet.microsoft.com%2Fen-us%2Flibrary%2Fmt346415.aspx%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EEdge%20Server%20environmental%20requirements%20in%20Skype%20for%20Business%20Server%202015.%3C%2FA%3E%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSTRONG%3EDoes%20this%20change%20anything%20for%20Cloud%20Connector%20Edition%3F%3C%2FSTRONG%3E%3C%2FP%3E%3CP%3E%3CSPAN%3ENo%2C%20the%20requirements%20for%20Cloud%20Connector%20Edition%20(see%20%3CA%20href%3D%22https%3A%2F%2Ftechnet.microsoft.com%2FEN-US%2Flibrary%2Fmt605227.aspx%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EPlan%20for%20Skype%20for%20Business%20Cloud%20Connector%20Edition)%20remain%20unchanged.%3C%2FA%3E%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSTRONG%3ECall%20to%20Action%3C%2FSTRONG%3E%3C%2FP%3E%3COL%3E%3CLI%3E%3CSPAN%3ECelebrate%20about%20the%20simplified%20port%20requirements%3C%2FSPAN%3E%3C%2FLI%3E%3CLI%3E%3CSPAN%3EUpdate%20any%20design%20templates%20you%20might%20have%3C%2FSPAN%3E%3C%2FLI%3E%3CLI%3E%3CSPAN%3E%3CSPAN%3EFor%20future%20deployments%2C%20open%20only%20TCP%2080%2C%20443%20and%20UDP%203478%2C%203479%2C%203480%2C%203481%20per%20new%20guideline%20(and%2C%20optionally%2C%2050%2C000-59%2C999%20UDP%20and%20TCP)%3C%2FSPAN%3E%3C%2FSPAN%3E%3CP%3EIf%20you%20have%20any%20questions%20or%20comments%2C%20please%20let%20us%20know%20in%20the%20%3CA%20href%3D%22http%3A%2F%2Faka.ms%2Fsofcommunity%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3Ecommunity%3C%2FA%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CEM%3EThis%20post%20is%20brought%20to%20you%20by%20%3CA%20href%3D%22http%3A%2F%2Faka.ms%2Fskypeacademy%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3ESkype%20Academy.%20Visit%20Skype%20Academy%20for%20technical%20trainings%20and%20readiness%20around%20the%20Skype%20Operations%20Framework.%3C%2FA%3E%3C%2FEM%3E%3C%2FP%3E%3CHR%20%2F%3E%3CP%3E%3CBR%20%2F%3E%3CBR%20%2F%3E%3C%2FP%3E%3C%2FLI%3E%3C%2FOL%3E%3C%2FTD%3E%3C%2FTR%3E%3C%2FTBODY%3E%3C%2FTABLE%3E%3C%2FLI%3E%3C%2FUL%3E%3C%2FLI%3E%3C%2FUL%3E%3C%2FLI%3E%3C%2FUL%3E%3C%2FBLOCKQUOTE%3E%3C%2FLI%3E%3C%2FOL%3E%3C%2FTD%3E%3C%2FTR%3E%3C%2FTBODY%3E%3C%2FTABLE%3E%3C%2FLI%3E%3C%2FUL%3E%3C%2FLI%3E%3C%2FUL%3E%3C%2FLI%3E%3C%2FUL%3E%3C%2FBLOCKQUOTE%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-182065%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-182065%22%20slang%3D%22en-US%22%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F132157%22%20target%3D%22_blank%22%3E%40Ali%20Fadavinia%3C%2FA%3E%2C%20unfortunately%20there%20are%20changes%20required%20from%20time%20to%20time.%20In%20the%20feature%20we%20want%20this%20to%20be%20more%20stable%2C%20but%20admins%20will%20have%20to%20monitor%20the%20page%20to%20learn%20about%20IP%20changes.%20As%20mention%20in%20the%20article%20there%20is%20an%20RSS%20feed%20available%2C%20however%20we%20plan%20to%20enable%20more%20automated%20ways%20in%20the%20future%20as%20described%20here%3A%26nbsp%3B%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2FOffice-365-Blog%2FAnnouncing-Office-365-endpoint-categories-and-Office-365-IP%2Fba-p%2F177638%22%20target%3D%22_blank%22%3EAnnouncing%3A%20Office%20365%20endpoint%20categories%20and%20Office%20365%20IP%20Address%20and%20URL%20web%20service%3C%2FA%3E%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-181888%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-181888%22%20slang%3D%22en-US%22%3E%3CP%3EDoes%20IP%20Ranges%20get%20updated%20frequently%20for%20Skype%20For%20Business%3F%20or%20if%26nbsp%3Bthey%20are%20permitted%26nbsp%3Bon%20firewall%2Fproxy%2C%26nbsp%3Bthey%20are%20good%20to%20go%20for%20long%20time%20without%20make%20any%20changes%3F%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EThanks%3C%2FP%3E%3CBLOCKQUOTE%3E%3CHR%20%2F%3E%26nbsp%3Bwrote%3A%3CBR%20%2F%3E%3CP%3E%3CEM%3ENote%3A%20This%20article%20applies%20only%20to%26nbsp%3BOffice%20365%20Worldwide%20(including%20Government%20Community%20Cloud).%20For%20guidance%20on%26nbsp%3B%3CA%20href%3D%22https%3A%2F%2Fsupport.office.com%2Fen-gb%2Farticle%2FOffice-365-operated-by-21-Vianet-5c47c07d-f9b6-4b78-a329-bfdc1b6da7a0%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EOffice%20365%20operated%20by%2021%20Vianet%2C%20%3C%2FA%3E%3CA%20href%3D%22https%3A%2F%2Fsupport.office.com%2Fen-gb%2Farticle%2FOffice-365-Germany-8a113a50-0071-4155-bb8e-eba5a8dbd4c8%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EOffice%20365%20Germany%2C%20%3C%2FA%3E%3CA%20href%3D%22https%3A%2F%2Fsupport.office.com%2Fen-gb%2Farticle%2FOffice-365-US-Government-DoD-5d7dce60-4892-4b58-b45e-ee42fe8a907f%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EOffice%20365%20U.S.%20Government%20DoD%20or%20%3C%2FA%3E%3CA%20href%3D%22https%3A%2F%2Fsupport.office.com%2Fen-gb%2Farticle%2FOffice-365-US-Government-GCC-High-cbd2369c-fd96-464c-bf48-c99826b459ee%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EOffice%20365%20U.S.%20Government%20GCC%20High%20click%20on%20the%20respective%20links.%3C%2FA%3E%3C%2FEM%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSPAN%3EWe%20are%20happy%20to%20announce%20that%20the%2050%2C000-59%2C999%20port%20range%20(UDP%20and%20TCP)%20is%20no%20longer%20a%20requirement%20for%20Skype%20for%20Business%20endpoints%20to%20communicate%20with%20Skype%20for%20Business%20Online.%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%3CSPAN%3EEarlier%20this%20year%20we%20talked%20about%20making%20simplification%20for%20network%20connectivity%20for%20Skype%20for%20Business%20Online%20(see%20blog%20article%20%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2FSkype-for-Business-Blog%2FUpdated-IP-ranges-and-ports-for-Skype-for-Business-Online%2Fba-p%2F47470%22%20target%3D%22_blank%22%3Ehere)%20and%20we%20recently%20updated%20our%20guidance%20and%20removed%20the%20mentioned%20port%20range%20as%20a%20requirement%3A%20%3C%2FA%3E%3CA%20href%3D%22https%3A%2F%2Fsupport.office.com%2Fen-us%2Farticle%2FOffice-365-URLs-and-IP-address-ranges-8548a211-3fe7-47cb-abb1-355ea5aa88a2%3Fui%3Den-US%26amp%3Brs%3Den-US%26amp%3Bad%3DUS%26amp%3BfromAR%3D1%23bkmk_lyo%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EOffice%20365%20URLs%20and%20IP%20address%20ranges%3C%2FA%3E%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSTRONG%3ESo%20which%20ports%20are%20required%20for%20clients%3F%3C%2FSTRONG%3E%3C%2FP%3E%3CP%3E%3CSPAN%3EAll%20clients%20need%20to%20be%20able%20to%20directly%20connect%20to%20Skype%20for%20Business%20Online%20on%20the%20following%20destination%20ports%3A%20(the%20IP%20addresses%20and%20FQDNs%20can%20be%20found%20in%20the%20%3CA%20href%3D%22https%3A%2F%2Fsupport.office.com%2Fen-us%2Farticle%2FOffice-365-URLs-and-IP-address-ranges-8548a211-3fe7-47cb-abb1-355ea5aa88a2%3Fui%3Den-US%26amp%3Brs%3Den-US%26amp%3Bad%3DUS%26amp%3BfromAR%3D1%23bkmk_lyo%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EOffice%20365%20URLs%20and%20IP%20address%20ranges)%3C%2FA%3E%3C%2FSPAN%3E%3C%2FP%3E%3CUL%3E%3CLI%3E%3CSPAN%3ETCP%2080%2C%20443%3C%2FSPAN%3E%3C%2FLI%3E%3CLI%3E%3CSPAN%3EUDP%203478%2C%203479%2C%203480%2C%203481%3C%2FSPAN%3E%3C%2FLI%3E%3CLI%3E%3CSPAN%3E%3CSPAN%3EOptional%3A%20UDP%2FTCP%2050%2C000-59%2C999%3C%2FSPAN%3E%3C%2FSPAN%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSTRONG%3EIs%20there%20a%20minimum%20client%20version%20required%20to%20benefit%20from%20the%20port%20changes%3F%3C%2FSTRONG%3E%3C%2FP%3E%3CP%3E%3CSPAN%3EThis%20change%20applies%20to%20all%20clients%20supported%20against%20Skype%20for%20Business%20Online.%20No%20clients%20are%20excluded%20and%20there%20are%20no%20specific%20minimum%20version%20required%20(although%20we%20always%20recommend%20to%20run%20the%20latest%20version).%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSTRONG%3EWhy%20are%20these%20ports%20not%20required%20anymore%3F%3C%2FSTRONG%3E%3C%2FP%3E%3CP%3E%3CSPAN%3ETo%20answer%20this%20question%2C%20it%20is%20important%20to%20understand%20first%20how%20the%2050%2C000-59%2C999%20ports%20were%20used%20in%20the%20first%20place.%20(To%20understand%20all%20the%20details%20of%20their%20purpose%2C%20we%20recommend%20watching%20%3CA%20href%3D%22http%3A%2F%2Faka.ms%2Fsa-ice%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3ETroubleshoot%20media%20flows%20in%20Skype%20for%20Business%20across%20online%2C%20server%20and%20hybrid.)%3C%2FA%3E%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%3CSPAN%3ELet's%20have%20the%20following%20example%3A%3C%2FSPAN%3E%3C%2FP%3E%3CUL%3E%3CLI%3E%3CSPAN%3EUser%20A%20wants%20to%20call%20User%20B%3C%2FSPAN%3E%3C%2FLI%3E%3CLI%3E%3CSPAN%3EFor%20the%20sake%20of%20the%20example%2C%20the%20direct%20connection%20between%20User%20A%20and%20User%20B%20is%20blocked%20(e.g.%20User%20and%20User%20B%20are%20at%20different%20branch%20offices%20behind%20firewalls)%2C%20so%20the%20media%20traffic%20cannot%20go%20directly%20peer%20to%20peer%20and%20needs%20to%20flow%20via%20Skype%20for%20Business%20Online%3C%2FSPAN%3E%3C%2FLI%3E%3CLI%3E%3CSPAN%3E%3CSPAN%3EThere%20are%20now%20the%20following%20possible%20media%20paths%3C%2FSPAN%3E%3C%2FSPAN%3E%3CUL%3E%3CLI%3E%3CSPAN%3EThe%2050%2C000-59%2C999%20port%20range%20can%20be%20leveraged%20to%20include%20only%20a%20single%20Relay%20Server%20in%20the%20media%20path%3C%2FSPAN%3E%3C%2FLI%3E%3CLI%3E%3CSPAN%3E%3CSPAN%3EWithout%20the%2050%2C000-59%2C999%20port%20range%2C%20the%20traffic%20needs%20to%20travel%20via%20two%20Relay%20Server.%3C%2FSPAN%3E%3C%2FSPAN%3E%3CP%3E%3CSPAN%3EAs%20you%20can%20see%2C%20closing%20the%2050%2C000-59%2C999%20port%20range%20will%20force%20the%20traffic%20to%20travel%20via%20an%20additional%20hop.%20While%20logic%20tells%20us%20that%20usually%20we%20want%20to%20avoid%20additional%20hops%20under%20all%20circumstances%2C%20the%20analysis%20on%20call%20quality%20data%20has%20shown%20us%2C%20that%20this%20additional%20hop%20does%20not%20significantly%20affect%20call%20quality%20-%20since%20both%20these%20Relay%20Servers%20are%20homed%20on%20the%20Microsoft%20Network%2C%20all%20traffic%20between%20the%20Relay%20Servers%20is%20sent%20over%20a%20highly%20reliable%20pipe%20designed%20for%20real-time%20communication.%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSTRONG%3EOur%20organization%20has%20these%20ports%20open%2C%20should%20we%20close%20them%3F%3C%2FSTRONG%3E%3C%2FP%3E%3CP%3E%3CSPAN%3EHaving%20the%2050%2C000-59%2C999%20port%20range%20open%20can%20still%20have%20(some)%20benefits%20when%20it%20comes%20to%20call%20setup%20times%20and%20under%20some%20circumstances%20on%20call%20quality.%20However%20in%20our%20data%20analysis%20and%20pilot%20deployments%20with%20some%20customers%20these%20differences%20did%20not%20show%20significance.%20If%20you%20have%20the%20ports%20open%20today%2C%20it%20makes%20sense%20to%20leave%20them%20open.%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSTRONG%3EWhat%20does%20this%20change%20for%20hybrid%20between%20Skype%20for%20Business%20Server%20and%20Skype%20for%20Business%20Online%3F%3C%2FSTRONG%3E%3C%2FP%3E%3CP%3E%3CSPAN%3EThis%20change%20only%20applies%20to%20users%20who%20are%20homed%20in%20Skype%20for%20Business%20Online.%20If%20you%20have%20an%20on-premises%20deployment%20of%20Skype%20for%20Business%2C%20the%20requirements%20for%20your%20Edge%20Server%20to%20communicate%20to%20Skype%20for%20Business%20Online%20remain%20unchanged%20(and%20also%20for%20any%20Federation%20scenarios%20including%20Skype%20for%20Business%20on-premises).%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%3CSPAN%3EThe%20A%2FV%20Edge%20Server%20in%20your%20environment%20will%20need%20to%20be%20configured%20liked%20this.%20Please%20note%20that%20the%20Source%20Port%20is%20only%20relevant%2C%20if%20your%20firewall%20requires%20a%20source%20port%20to%20be%20specified%20(and%20a%20lot%20of%20firewalls%20do%20not%20require%20this%20setting)%3A%3C%2FSPAN%3E%3C%2FP%3E%3CTABLE%20border%3D%222%22%3E%3CTBODY%3E%3CTR%3E%3CTD%3E%3CP%3E%3CSPAN%3ESource%20IP%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3EDestination%20IP%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3ESource%20Port%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3EDestination%20Port%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3C%2FTR%3E%3CTR%3E%3CTD%3E%3CP%3E%3CSPAN%3EA%2FV%20Edge%20service%20interface%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3EAny%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3EUDP%203478%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3EUDP%203478%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3C%2FTR%3E%3CTR%3E%3CTD%3E%3CP%3E%3CSPAN%3EA%2FV%20Edge%20service%20interface%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3EAny%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3ETCP%2050%2C000-59%2C999%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3ETCP%20443%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3C%2FTR%3E%3CTR%3E%3CTD%3E%3CP%3EAny%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3EA%2FV%20Edge%20service%20interface%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3EAny%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3EUDP%203478%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3C%2FTR%3E%3CTR%3E%3CTD%3E%3CP%3EAny%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3EA%2FV%20Edge%20service%20interface%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3EAny%3C%2FSPAN%3E%3C%2FP%3E%3C%2FTD%3E%3CTD%3E%3CP%3E%3CSPAN%3ETCP%20443%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%3CSPAN%3E%26nbsp%3B%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%3CSPAN%3EFull%20requirements%20for%20Skype%20for%20Business%20Edge%20Server%20can%20be%20found%20here%3A%20%3CA%20href%3D%22https%3A%2F%2Ftechnet.microsoft.com%2Fen-us%2Flibrary%2Fmt346415.aspx%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EEdge%20Server%20environmental%20requirements%20in%20Skype%20for%20Business%20Server%202015.%3C%2FA%3E%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSTRONG%3EDoes%20this%20change%20anything%20for%20Cloud%20Connector%20Edition%3F%3C%2FSTRONG%3E%3C%2FP%3E%3CP%3E%3CSPAN%3ENo%2C%20the%20requirements%20for%20Cloud%20Connector%20Edition%20(see%20%3CA%20href%3D%22https%3A%2F%2Ftechnet.microsoft.com%2FEN-US%2Flibrary%2Fmt605227.aspx%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EPlan%20for%20Skype%20for%20Business%20Cloud%20Connector%20Edition)%20remain%20unchanged.%3C%2FA%3E%3C%2FSPAN%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CSTRONG%3ECall%20to%20Action%3C%2FSTRONG%3E%3C%2FP%3E%3COL%3E%3CLI%3E%3CSPAN%3ECelebrate%20about%20the%20simplified%20port%20requirements%3C%2FSPAN%3E%3C%2FLI%3E%3CLI%3E%3CSPAN%3EUpdate%20any%20design%20templates%20you%20might%20have%3C%2FSPAN%3E%3C%2FLI%3E%3CLI%3E%3CSPAN%3E%3CSPAN%3EFor%20future%20deployments%2C%20open%20only%20TCP%2080%2C%20443%20and%20UDP%203478%2C%203479%2C%203480%2C%203481%20per%20new%20guideline%20(and%2C%20optionally%2C%2050%2C000-59%2C999%20UDP%20and%20TCP)%3C%2FSPAN%3E%3C%2FSPAN%3E%3CP%3EIf%20you%20have%20any%20questions%20or%20comments%2C%20please%20let%20us%20know%20in%20the%20%3CA%20href%3D%22http%3A%2F%2Faka.ms%2Fsofcommunity%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3Ecommunity%3C%2FA%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%3CEM%3EThis%20post%20is%20brought%20to%20you%20by%20%3CA%20href%3D%22http%3A%2F%2Faka.ms%2Fskypeacademy%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3ESkype%20Academy.%20Visit%20Skype%20Academy%20for%20technical%20trainings%20and%20readiness%20around%20the%20Skype%20Operations%20Framework.%3C%2FA%3E%3C%2FEM%3E%3C%2FP%3E%3CHR%20%2F%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3C%2FLI%3E%3C%2FOL%3E%3C%2FTD%3E%3C%2FTR%3E%3C%2FTBODY%3E%3C%2FTABLE%3E%3C%2FLI%3E%3C%2FUL%3E%3C%2FLI%3E%3C%2FUL%3E%3C%2FLI%3E%3C%2FUL%3E%3C%2FBLOCKQUOTE%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-179754%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-179754%22%20slang%3D%22en-US%22%3E%3CP%3ESure.%20We%20will%20check.%26nbsp%3B%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-179270%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-179270%22%20slang%3D%22en-US%22%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F40284%22%20target%3D%22_blank%22%3E%40Sankarasubramanian%20Parameswaran%3C%2FA%3E%2C%20for%20testing%20the%20ports%20I%20recommend%20the%26nbsp%3B%3CA%20href%3D%22https%3A%2F%2Fwww.microsoft.com%2Fen-us%2Fdownload%2Fdetails.aspx%3Fid%3D53885%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3ESkype%20for%20Business%20Network%20Assessment%20Tool%3C%2FA%3E.%20%22Running%26nbsp%3BNetworkAssessmentTool.exe%20%2F%20connectivitycheck%22%20will%20allow%20you%20to%20test%20connectivity.%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-178931%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-178931%22%20slang%3D%22en-US%22%3E%3CP%3ENothing%20Special.%20I%20started%20with%20a%20Client%20trace%20and%20analyzed%20it%20in%20Snooper.%20In%20the%20end%20I%20user%20Wireshark%20to%20trace%20all%20TCP%20Port%2043%20traffic...%20Cheers%20Christian%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-178919%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-178919%22%20slang%3D%22en-US%22%3E%3CP%3EDo%20you%20have%20any%20recommendation%20of%20tools%20to%20verify%20the%20connections%20and%20port%20settings%3C%2FP%3E%0A%3CBLOCKQUOTE%3E%3CHR%20%2F%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F15786%22%20target%3D%22_blank%22%3E%40Thomas%20Binder%3C%2FA%3E%20wrote%3A%3CBR%20%2F%3E%0A%3CP%3E%3CEM%3ENote%3A%20This%20article%20applies%20only%20to%26nbsp%3BOffice%20365%20Worldwide%20(including%20Government%20Community%20Cloud).%20For%20guidance%20on%26nbsp%3B%3CA%20class%3D%22ocpArticleLink%22%20href%3D%22https%3A%2F%2Fsupport.office.com%2Fen-gb%2Farticle%2FOffice-365-operated-by-21-Vianet-5c47c07d-f9b6-4b78-a329-bfdc1b6da7a0%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EOffice%20365%20operated%20by%2021%20Vianet%3C%2FA%3E%2C%20%3CA%20class%3D%22ocpArticleLink%22%20href%3D%22https%3A%2F%2Fsupport.office.com%2Fen-gb%2Farticle%2FOffice-365-Germany-8a113a50-0071-4155-bb8e-eba5a8dbd4c8%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EOffice%20365%20Germany%3C%2FA%3E%2C%20%3CA%20class%3D%22ocpArticleLink%22%20href%3D%22https%3A%2F%2Fsupport.office.com%2Fen-gb%2Farticle%2FOffice-365-US-Government-DoD-5d7dce60-4892-4b58-b45e-ee42fe8a907f%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EOffice%20365%20U.S.%20Government%20DoD%3C%2FA%3E%20or%20%3CA%20class%3D%22ocpArticleLink%22%20href%3D%22https%3A%2F%2Fsupport.office.com%2Fen-gb%2Farticle%2FOffice-365-US-Government-GCC-High-cbd2369c-fd96-464c-bf48-c99826b459ee%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EOffice%20365%20U.S.%20Government%20GCC%20High%3C%2FA%3E%20click%20on%20the%20respective%20links.%3C%2FEM%3E%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3E%3CSPAN%3EWe%20are%20happy%20to%20announce%20that%20the%2050%2C000-59%2C999%20port%20range%20(UDP%20and%20TCP)%20is%20no%20longer%20a%20requirement%20for%20Skype%20for%20Business%20endpoints%20to%20communicate%20with%20Skype%20for%20Business%20Online.%3C%2FSPAN%3E%3C%2FP%3E%0A%3CP%3E%3CSPAN%3EEarlier%20this%20year%20we%20talked%20about%20making%20simplification%20for%20network%20connectivity%20for%20Skype%20for%20Business%20Online%20(see%20blog%20article%20%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2FSkype-for-Business-Blog%2FUpdated-IP-ranges-and-ports-for-Skype-for-Business-Online%2Fba-p%2F47470%22%20target%3D%22_blank%22%3Ehere%3C%2FA%3E)%20and%20we%20recently%20updated%20our%20guidance%20and%20removed%20the%20mentioned%20port%20range%20as%20a%20requirement%3A%20%3CA%20href%3D%22https%3A%2F%2Fsupport.office.com%2Fen-us%2Farticle%2FOffice-365-URLs-and-IP-address-ranges-8548a211-3fe7-47cb-abb1-355ea5aa88a2%3Fui%3Den-US%26amp%3Brs%3Den-US%26amp%3Bad%3DUS%26amp%3BfromAR%3D1%23bkmk_lyo%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EOffice%20365%20URLs%20and%20IP%20address%20ranges%3C%2FA%3E%3C%2FSPAN%3E%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3E%3CSTRONG%3ESo%20which%20ports%20are%20required%20for%20clients%3F%3C%2FSTRONG%3E%3C%2FP%3E%0A%3CP%3E%3CSPAN%3EAll%20clients%20need%20to%20be%20able%20to%20directly%20connect%20to%20Skype%20for%20Business%20Online%20on%20the%20following%20destination%20ports%3A%20(the%20IP%20addresses%20and%20FQDNs%20can%20be%20found%20in%20the%20%3CA%20href%3D%22https%3A%2F%2Fsupport.office.com%2Fen-us%2Farticle%2FOffice-365-URLs-and-IP-address-ranges-8548a211-3fe7-47cb-abb1-355ea5aa88a2%3Fui%3Den-US%26amp%3Brs%3Den-US%26amp%3Bad%3DUS%26amp%3BfromAR%3D1%23bkmk_lyo%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EOffice%20365%20URLs%20and%20IP%20address%20ranges%3C%2FA%3E)%3C%2FSPAN%3E%3C%2FP%3E%0A%3CUL%3E%0A%3CLI%3E%3CSPAN%3ETCP%2080%2C%20443%3C%2FSPAN%3E%3C%2FLI%3E%0A%3CLI%3E%3CSPAN%3EUDP%203478%2C%203479%2C%203480%2C%203481%3C%2FSPAN%3E%3C%2FLI%3E%0A%3CLI%3E%3CSPAN%3EOptional%3A%20UDP%2FTCP%2050%2C000-59%2C999%3C%2FSPAN%3E%3C%2FLI%3E%0A%3C%2FUL%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3E%3CSTRONG%3EIs%20there%20a%20minimum%20client%20version%20required%20to%20benefit%20from%20the%20port%20changes%3F%3C%2FSTRONG%3E%3C%2FP%3E%0A%3CP%3E%3CSPAN%3EThis%20change%20applies%20to%20all%20clients%20supported%20against%20Skype%20for%20Business%20Online.%20No%20clients%20are%20excluded%20and%20there%20are%20no%20specific%20minimum%20version%20required%20(although%20we%20always%20recommend%20to%20run%20the%20latest%20version).%3C%2FSPAN%3E%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3E%3CSTRONG%3EWhy%20are%20these%20ports%20not%20required%20anymore%3F%3C%2FSTRONG%3E%3C%2FP%3E%0A%3CP%3E%3CSPAN%3ETo%20answer%20this%20question%2C%20it%20is%20important%20to%20understand%20first%20how%20the%2050%2C000-59%2C999%20ports%20were%20used%20in%20the%20first%20place.%20(To%20understand%20all%20the%20details%20of%20their%20purpose%2C%20we%20recommend%20watching%20%3CA%20href%3D%22http%3A%2F%2Faka.ms%2Fsa-ice%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3ETroubleshoot%20media%20flows%20in%20Skype%20for%20Business%20across%20online%2C%20server%20and%20hybrid%3C%2FA%3E.)%3C%2FSPAN%3E%3C%2FP%3E%0A%3CP%3E%3CSPAN%3ELet's%20have%20the%20following%20example%3A%3C%2FSPAN%3E%3C%2FP%3E%0A%3CUL%3E%0A%3CLI%3E%3CSPAN%3EUser%20A%20wants%20to%20call%20User%20B%3C%2FSPAN%3E%3C%2FLI%3E%0A%3CLI%3E%3CSPAN%3EFor%20the%20sake%20of%20the%20example%2C%20the%20direct%20connection%20between%20User%20A%20and%20User%20B%20is%20blocked%20(e.g.%20User%20and%20User%20B%20are%20at%20different%20branch%20offices%20behind%20firewalls)%2C%20so%20the%20media%20traffic%20cannot%20go%20directly%20peer%20to%20peer%20and%20needs%20to%20flow%20via%20Skype%20for%20Business%20Online%3C%2FSPAN%3E%3C%2FLI%3E%0A%3CLI%3E%3CSPAN%3EThere%20are%20now%20the%20following%20possible%20media%20paths%3C%2FSPAN%3E%0A%3CUL%3E%0A%3CLI%3E%3CSPAN%3EThe%2050%2C000-59%2C999%20port%20range%20can%20be%20leveraged%20to%20include%20only%20a%20single%20Relay%20Server%20in%20the%20media%20path%3C%2FSPAN%3E%3C%2FLI%3E%0A%3CLI%3E%3CSPAN%3EWithout%20the%2050%2C000-59%2C999%20port%20range%2C%20the%20traffic%20needs%20to%20travel%20via%20two%20Relay%20Server.%3C%2FSPAN%3E%3C%2FLI%3E%0A%3C%2FUL%3E%0A%3C%2FLI%3E%0A%3C%2FUL%3E%0A%3CP%3E%3CSPAN%3EAs%20you%20can%20see%2C%20closing%20the%2050%2C000-59%2C999%20port%20range%20will%20force%20the%20traffic%20to%20travel%20via%20an%20additional%20hop.%20While%20logic%20tells%20us%20that%20usually%20we%20want%20to%20avoid%20additional%20hops%20under%20all%20circumstances%2C%20the%20analysis%20on%20call%20quality%20data%20has%20shown%20us%2C%20that%20this%20additional%20hop%20does%20not%20significantly%20affect%20call%20quality%20-%20since%20both%20these%20Relay%20Servers%20are%20homed%20on%20the%20Microsoft%20Network%2C%20all%20traffic%20between%20the%20Relay%20Servers%20is%20sent%20over%20a%20highly%20reliable%20pipe%20designed%20for%20real-time%20communication.%3C%2FSPAN%3E%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3E%3CSTRONG%3EOur%20organization%20has%20these%20ports%20open%2C%20should%20we%20close%20them%3F%3C%2FSTRONG%3E%3C%2FP%3E%0A%3CP%3E%3CSPAN%3EHaving%20the%2050%2C000-59%2C999%20port%20range%20open%20can%20still%20have%20(some)%20benefits%20when%20it%20comes%20to%20call%20setup%20times%20and%20under%20some%20circumstances%20on%20call%20quality.%20However%20in%20our%20data%20analysis%20and%20pilot%20deployments%20with%20some%20customers%20these%20differences%20did%20not%20show%20significance.%20If%20you%20have%20the%20ports%20open%20today%2C%20it%20makes%20sense%20to%20leave%20them%20open.%3C%2FSPAN%3E%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3E%3CSTRONG%3EWhat%20does%20this%20change%20for%20hybrid%20between%20Skype%20for%20Business%20Server%20and%20Skype%20for%20Business%20Online%3F%3C%2FSTRONG%3E%3C%2FP%3E%0A%3CP%3E%3CSPAN%3EThis%20change%20only%20applies%20to%20users%20who%20are%20homed%20in%20Skype%20for%20Business%20Online.%20If%20you%20have%20an%20on-premises%20deployment%20of%20Skype%20for%20Business%2C%20the%20requirements%20for%20your%20Edge%20Server%20to%20communicate%20to%20Skype%20for%20Business%20Online%20remain%20unchanged%20(and%20also%20for%20any%20Federation%20scenarios%20including%20Skype%20for%20Business%20on-premises).%3C%2FSPAN%3E%3C%2FP%3E%0A%3CP%3E%3CSPAN%3EThe%20A%2FV%20Edge%20Server%20in%20your%20environment%20will%20need%20to%20be%20configured%20liked%20this.%20Please%20note%20that%20the%20Source%20Port%20is%20only%20relevant%2C%20if%20your%20firewall%20requires%20a%20source%20port%20to%20be%20specified%20(and%20a%20lot%20of%20firewalls%20do%20not%20require%20this%20setting)%3A%3C%2FSPAN%3E%3C%2FP%3E%0A%3CTABLE%20border%3D%222%22%3E%0A%3CTBODY%3E%0A%3CTR%3E%0A%3CTD%20width%3D%22174%22%3E%0A%3CP%3E%3CSPAN%3ESource%20IP%3C%2FSPAN%3E%3C%2FP%3E%0A%3C%2FTD%3E%0A%3CTD%20width%3D%22174%22%3E%0A%3CP%3E%3CSPAN%3EDestination%20IP%3C%2FSPAN%3E%3C%2FP%3E%0A%3C%2FTD%3E%0A%3CTD%20width%3D%22132%22%3E%0A%3CP%3E%3CSPAN%3ESource%20Port%3C%2FSPAN%3E%3C%2FP%3E%0A%3C%2FTD%3E%0A%3CTD%20width%3D%22138%22%3E%0A%3CP%3E%3CSPAN%3EDestination%20Port%3C%2FSPAN%3E%3C%2FP%3E%0A%3C%2FTD%3E%0A%3C%2FTR%3E%0A%3CTR%3E%0A%3CTD%20width%3D%22174%22%3E%0A%3CP%3E%3CSPAN%3EA%2FV%20Edge%20service%20interface%3C%2FSPAN%3E%3C%2FP%3E%0A%3C%2FTD%3E%0A%3CTD%20width%3D%22174%22%3E%0A%3CP%3EAny%3C%2FP%3E%0A%3C%2FTD%3E%0A%3CTD%20width%3D%22132%22%3E%0A%3CP%3E%3CSPAN%3EUDP%203478%3C%2FSPAN%3E%3C%2FP%3E%0A%3C%2FTD%3E%0A%3CTD%20width%3D%22138%22%3E%0A%3CP%3E%3CSPAN%3EUDP%203478%3C%2FSPAN%3E%3C%2FP%3E%0A%3C%2FTD%3E%0A%3C%2FTR%3E%0A%3CTR%3E%0A%3CTD%20width%3D%22174%22%3E%0A%3CP%3E%3CSPAN%3EA%2FV%20Edge%20service%20interface%3C%2FSPAN%3E%3C%2FP%3E%0A%3C%2FTD%3E%0A%3CTD%20width%3D%22174%22%3E%0A%3CP%3E%3CSPAN%3EA%3C%2FSPAN%3Eny%3C%2FP%3E%0A%3C%2FTD%3E%0A%3CTD%20width%3D%22132%22%3E%0A%3CP%3E%3CSPAN%3ETCP%2050%2C000-59%2C999%3C%2FSPAN%3E%3C%2FP%3E%0A%3C%2FTD%3E%0A%3CTD%20width%3D%22138%22%3E%0A%3CP%3E%3CSPAN%3ETCP%20443%3C%2FSPAN%3E%3C%2FP%3E%0A%3C%2FTD%3E%0A%3C%2FTR%3E%0A%3CTR%3E%0A%3CTD%20width%3D%22174%22%3E%0A%3CP%3EAny%3C%2FP%3E%0A%3C%2FTD%3E%0A%3CTD%20width%3D%22174%22%3E%0A%3CP%3E%3CSPAN%3EA%2FV%20Edge%20service%20interface%3C%2FSPAN%3E%3C%2FP%3E%0A%3C%2FTD%3E%0A%3CTD%20width%3D%22132%22%3E%0A%3CP%3E%3CSPAN%3EAny%3C%2FSPAN%3E%3C%2FP%3E%0A%3C%2FTD%3E%0A%3CTD%20width%3D%22138%22%3E%0A%3CP%3E%3CSPAN%3EUDP%203478%3C%2FSPAN%3E%3C%2FP%3E%0A%3C%2FTD%3E%0A%3C%2FTR%3E%0A%3CTR%3E%0A%3CTD%20width%3D%22174%22%3E%0A%3CP%3EAny%3C%2FP%3E%0A%3C%2FTD%3E%0A%3CTD%20width%3D%22174%22%3E%0A%3CP%3E%3CSPAN%3EA%2FV%20Edge%20service%20interface%3C%2FSPAN%3E%3C%2FP%3E%0A%3C%2FTD%3E%0A%3CTD%20width%3D%22132%22%3E%0A%3CP%3E%3CSPAN%3EAny%3C%2FSPAN%3E%3C%2FP%3E%0A%3C%2FTD%3E%0A%3CTD%20width%3D%22138%22%3E%0A%3CP%3E%3CSPAN%3ETCP%20443%3C%2FSPAN%3E%3C%2FP%3E%0A%3C%2FTD%3E%0A%3C%2FTR%3E%0A%3C%2FTBODY%3E%0A%3C%2FTABLE%3E%0A%3CP%3E%3CSPAN%3E%26nbsp%3B%3C%2FSPAN%3E%3C%2FP%3E%0A%3CP%3E%3CSPAN%3EFull%20requirements%20for%20Skype%20for%20Business%20Edge%20Server%20can%20be%20found%20here%3A%20%3CA%20href%3D%22https%3A%2F%2Ftechnet.microsoft.com%2Fen-us%2Flibrary%2Fmt346415.aspx%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EEdge%20Server%20environmental%20requirements%20in%20Skype%20for%20Business%20Server%202015%3C%2FA%3E.%20%3C%2FSPAN%3E%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3E%3CSTRONG%3EDoes%20this%20change%20anything%20for%20Cloud%20Connector%20Edition%3F%3C%2FSTRONG%3E%3C%2FP%3E%0A%3CP%3E%3CSPAN%3ENo%2C%20the%20requirements%20for%20Cloud%20Connector%20Edition%20(see%20%3CA%20href%3D%22https%3A%2F%2Ftechnet.microsoft.com%2FEN-US%2Flibrary%2Fmt605227.aspx%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3EPlan%20for%20Skype%20for%20Business%20Cloud%20Connector%20Edition%3C%2FA%3E)%20remain%20unchanged.%3C%2FSPAN%3E%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3E%3CSTRONG%3ECall%20to%20Action%3C%2FSTRONG%3E%3C%2FP%3E%0A%3COL%3E%0A%3CLI%3E%3CSPAN%3ECelebrate%20about%20the%20simplified%20port%20requirements%3C%2FSPAN%3E%3C%2FLI%3E%0A%3CLI%3E%3CSPAN%3EUpdate%20any%20design%20templates%20you%20might%20have%3C%2FSPAN%3E%3C%2FLI%3E%0A%3CLI%3E%3CSPAN%3EFor%20future%20deployments%2C%20open%20only%20TCP%2080%2C%20443%20and%20UDP%203478%2C%203479%2C%203480%2C%203481%20per%20new%20guideline%20(and%2C%20optionally%2C%2050%2C000-59%2C999%20UDP%20and%20TCP)%3C%2FSPAN%3E%3C%2FLI%3E%0A%3C%2FOL%3E%0A%3CP%3EIf%20you%20have%20any%20questions%20or%20comments%2C%20please%20let%20us%20know%20in%20the%20%3CA%20href%3D%22http%3A%2F%2Faka.ms%2Fsofcommunity%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3Ecommunity%3C%2FA%3E%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3E%3CEM%3EThis%20post%20is%20brought%20to%20you%20by%20%3CA%20href%3D%22http%3A%2F%2Faka.ms%2Fskypeacademy%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3ESkype%20Academy%3C%2FA%3E.%20Visit%20Skype%20Academy%20for%20technical%20trainings%20and%20readiness%20around%20the%20Skype%20Operations%20Framework.%20%3C%2FEM%3E%3C%2FP%3E%0A%3CHR%20%2F%3E%3C%2FBLOCKQUOTE%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-177697%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-177697%22%20slang%3D%22en-US%22%3E%3CP%3EI%20had%20a%20Case%20at%20a%20Customer%20where%20Desktop%20sharing%20with%20External%20users%20was%20constantly%20failing.%20All%20other%20modalities%20worked%20fine.%20We%20also%20checked%20ports%2C%20etc.%20several%20times.%20In%20the%20end%20I%20took%20a%20Network%20trace%20from%20an%20internal%20Client%20Machine.%20It%26nbsp%3B%20turned%20out%20to%20be%20an%20issues%20with%20a%20security%20product%20they%20were%20using.%20All%20requests%20to%20TCP%20port%20443%20(remember%3A%20Desktop%20Sharing%20uses%20TCP%20443)%20were%20redirected%20to%20a%20Proxy%20Server%20-%20regardless%20of%20Proxy%20Settings%20in%20the%20browser%2C%20etc.%20After%20we%20configured%20an%20exception%20in%20the%20security%20product%20to%20allow%20tcp%20443%20traffic%20to%20Edge%20Servers%20without%20a%20Proxy%2C%20everything%20started%20working...%20Just%20my%202%20Cents%2C%20Cheers%20Christian%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-177689%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-177689%22%20slang%3D%22en-US%22%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F40284%22%20target%3D%22_blank%22%3E%40Sankarasubramanian%20Parameswaran%3C%2FA%3E%2C%20I%20recommend%20to%20open%20a%20case%20with%20support.%20Reasons%20can%20range%20from%20ports%20not%20open%2C%20missing%20IP%20ranges%2C%20proxy%20configuration%2C%20firewall%20configuration%2C%20etc.%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-177487%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-177487%22%20slang%3D%22en-US%22%3E%3CP%3Ewe%20have%20another%20issue%20in%20the%20Skype.%20we%20have%20opened%20all%20the%20ports%20for%20all%20our%20users%20for%20the%20Skype%20communication%2C%20and%20it%20is%20failed%20due%20to%20below%20error%20for%20the%20desktop%20sharing.%20any%20thoughts%3C%2FP%3E%0A%3CP%3Eerror%20message%3C%2FP%3E%0A%3CP%3E%3CSPAN%20style%3D%22color%3A%20rgb(22%2C%2035%2C%2058)%3B%20text-transform%3A%20none%3B%20text-indent%3A%200px%3B%20letter-spacing%3A%20normal%3B%20font-family%3A%20%26quot%3BSegoe%20UI%20Regular%26quot%3B%2C%20Segoe%2C%20Tahoma%2C%20Helvetica%2C%20Arial%2C%20sans-serif%3B%20font-size%3A%2014px%3B%20font-style%3A%20normal%3B%20font-weight%3A%20400%3B%20word-spacing%3A%200px%3B%20float%3A%20none%3B%20display%3A%20inline%20!important%3B%20white-space%3A%20normal%3B%20orphans%3A%202%3B%20widows%3A%202%3B%20background-color%3A%20rgb(240%2C%20241%2C%20245)%3B%20font-variant-ligatures%3A%20normal%3B%20font-variant-caps%3A%20normal%3B%20-webkit-text-stroke-width%3A%200px%3B%20text-decoration-style%3A%20initial%3B%20text-decoration-color%3A%20initial%3B%22%3ECall%20failed%20to%20establish%20due%20to%20a%20media%20connectivity%20failure%20when%20one%20endpoint%20is%20internal%20and%20the%20other%20is%20remote%3C%2FSPAN%3E%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-177483%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-177483%22%20slang%3D%22en-US%22%3E%3CP%3EHi%20Thomas%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3EWe%20have%20tried%20with%204%20ports%20and%20it%20does%20not%20work.%20We%20have%20to%20open%20all%20the%2050%2C000%20ports%20to%20make%20it%20works%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-173559%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-173559%22%20slang%3D%22en-US%22%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F40284%22%20target%3D%22_blank%22%3E%40Sankarasubramanian%20Parameswaran%3C%2FA%3E%2C%20sorry%20I%20just%20realized%20I%20never%20closed%20the%20loop%20on%20your%20question%20regarding%20Surface%20Hub.%20For%20media%20Surface%20Hub%20will%20behave%20like%20the%20other%20clients%20--%20it%20will%20try%20to%20connect%20via%2050%2C000-59%2C999%26nbsp%3Bport%20range%20if%20open%2C%20but%203478-81%20UDP%20will%20be%20sufficient.%20So%20the%20guidance%20in%20the%20article%20applies%20fully%20to%20Surface%20Hub%20as%20well.%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-124981%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-124981%22%20slang%3D%22en-US%22%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F92830%22%20target%3D%22_blank%22%3E%40bel.vincent%3C%2FA%3E%20Proxy%20Servers%20are%20not%20recommended%2C%20but%20Skype%20for%20Business%20will%20leverage%20the%20Proxy%20Server%20configured%20for%20your%20machine.%20A%20PAC%20file%20can%20be%20found%20here%3A%26nbsp%3B%3CA%20href%3D%22https%3A%2F%2Fsupport.office.com%2Fen-us%2Farticle%2FManaging-Office-365-endpoints-99cab9d4-ef59-4207-9f2b-3728eb46bf9a%3Fui%3Den-US%26amp%3Brs%3Den-US%26amp%3Bad%3DUS%23ID0EABAAA%3D2._Proxies%26amp%3BID0EACAAA%3D0._Overview%20%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3Ehttps%3A%2F%2Fsupport.office.com%2Fen-us%2Farticle%2FManaging-Office-365-endpoints-99cab9d4-ef59-4207-9f2b-3728eb46bf9a%3Fui%3Den-US%26amp%3Brs%3Den-US%26amp%3Bad%3DUS%23ID0EABAAA%3D2._Proxies%26amp%3BID0EACAAA%3D0._Overview%3C%2FA%3E%20%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-124602%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-124602%22%20slang%3D%22en-US%22%3E%3CP%3EHi%20Thomas%2C%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EThanks%20for%20your%20great%20post%20and%20regular%20answers!%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EAny%20plan%20to%20be%20able%20to%20set%20a%20proxy%20in%20the%20Skype%20for%20Business%20Client%3F%3C%2FP%3E%3CP%3EOr%20at%20least%20take%20the%20one%20set%20in%20a%20PAC%20file%3F%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-120815%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-120815%22%20slang%3D%22en-US%22%3E%3CP%3EThank%20you.%20Please%20keep%20us%20posted.%20Our%20network%20team%20not%20ready%20to%20open%20all%20the%20ports%20for%20the%20surface%20hub.%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-120722%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-120722%22%20slang%3D%22en-US%22%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F40284%22%20target%3D%22_blank%22%3E%40Sankarasubramanian%20Parameswaran%3C%2FA%3E%2C%20thanks%20for%20raising%20this.%20I%20will%20look%20into%20this.%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-120331%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-120331%22%20slang%3D%22en-US%22%3E%3CP%3ENope%20it%20is%20not%20working.%20when%20we%20approach%20surface%20hub%20team%20they%20told%20it%20will%20use%2050%2C000%20ports%20not%203478%20ports....%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EIssue%20Definition%3A%20According%20to%20the%20O365%20SfB%20documentation%2C%20the%2050k%2B%20ports%20are%20optional%3A%3CBR%20%2F%3E%3CBR%20%2F%3E%3CA%20href%3D%22https%3A%2F%2Fna01.safelinks.protection.outlook.com%2F%3Furl%3Dhttps%253A%252F%252Fsupport.office.com%252Fen-us%252Farticle%252FOffice-365-URLs-and-IP-address-ranges-8548a211-3fe7-47cb-abb1-355ea5aa88a2%2523bkmk_lyo%26amp%3Bdata%3D02%257C01%257Csparameswaran%2540wmata.com%257C5c3225b0fa0b4ef8ff6208d51bb4bf63%257Cad5836f40d7443cd83c57e69eaa67915%257C0%257C0%257C636445385492225491%26amp%3Bsdata%3D4hzvF%252BXxnb%252F2Ld1dBXFTCC1PWRQUYJSJsTOfTZs0Yt4%253D%26amp%3Breserved%3D0%22%20target%3D%22_blank%22%20rel%3D%22nofollow%20noopener%20noreferrer%20noopener%20noreferrer%22%3Ehttps%3A%2F%2Fsupport.office.com%2Fen-us%2Farticle%2FOffice-365-URLs-and-IP-address-ranges-8548a211-3fe7-47cb-abb1-355ea5aa88a2%23bkmk_lyo%3C%2FA%3E%3C%2FP%3E%3CP%3EBut%20with%20the%20Hub's%20SfB%20client%2C%20they%20are%20not%20optional%2C%20and%20you%20have%20found%20that%20hosted%20calls%2Fmulti-party%20calls%20cannot%20establish%20media%20sessions%20to%20Skype%20for%20Business%20online%20unless%20those%20ports%20are%20opened.%3CBR%20%2F%3E%3CBR%20%2F%3EScope%20Agreement%3A%20This%20case%20will%20be%20considered%20resolved%20when%20we%20have%20updated%20the%20documentation%20to%20properly%20list%20the%20Hub's%20requirements%20or%20provided%20a%20timeline%20for%20when%20the%20Hub's%20SfB%20client%20will%20function%20like%20the%20desktop%20client%20in%20terms%20of%20port%20usage.%3CBR%20%2F%3E%3CBR%20%2F%3E%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-119734%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-119734%22%20slang%3D%22en-US%22%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F40284%22%20target%3D%22_blank%22%3E%40Sankarasubramanian%20Parameswaran%3C%2FA%3E%2C%20since%20these%20are%20the%20ports%20on%20the%20service%20(not%20on%20the%20client)%20they%20apply%20to%20all%20clients.%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-119695%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-119695%22%20slang%3D%22en-US%22%3E%3CP%3Ehow%20about%20microsoft%20surface%20hub%20whether%20it%20will%20use%20the%20same%20port%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-119518%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-119518%22%20slang%3D%22en-US%22%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F32981%22%20target%3D%22_blank%22%3E%40laurent%20Teruin%3C%2FA%3E%2C%20yes%20the%20ports%2050%2C000-59%2C999%20will%20still%20be%20used%20for%20audio%2C%20video%20and%20sharing%20--%20if%20they%20are%20open%20and%20can%20have%20positive%20effects%20on%20call%20setup%20times%20as%20well%20as%20call%20quality.%20However%20the%20effects%20are%20very%20small%20and%20do%20not%20outweigh%20the%20hassle%20that%20a%20lot%20of%20companies%20have%20to%20open%20them.%20For%20a%20detailed%20discussion%20I%20recommend%20to%20watch%20the%20following%20session%20from%20Ignite%3A%26nbsp%3B%3CA%20href%3D%22https%3A%2F%2Fmyignite.microsoft.com%2Fsessions%2F53247%3Fsource%3Dsessions%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3Ehttps%3A%2F%2Fmyignite.microsoft.com%2Fsessions%2F53247%3Fsource%3Dsessions%3C%2FA%3E%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-119512%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-119512%22%20slang%3D%22en-US%22%3E%3CP%3Ethanks%20For%20this%20Article%20Thomas%3C%2FP%3E%3CP%3EJust%20a%20little%20question%20regarding%20these%20dynamic%20ports%20and%20their%20usefullness%20when%20video%20calls%20happens%20between%20a%20Skype%20client%20and%20a%20Legacy%20one%20as%20Lync.%3C%2FP%3E%3CP%3EI%20seem%20to%20recall%20that%20they%20are%20still%20used%20no%20%3F%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-107292%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-107292%22%20slang%3D%22en-US%22%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F78326%22%20target%3D%22_blank%22%3E%40Akpevwe%20Egbelughe%3C%2FA%3E%2C%20the%20ports%20above%20are%20mostly%20for%20media%20--%20for%20registration%20you%20will%20need%20port%20TCP%2080%20and%20443.%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-106912%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-106912%22%20slang%3D%22en-US%22%3E%3CP%3EHi%2C%20%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F15786%22%20target%3D%22_blank%22%3E%40Thomas%20Binder%3C%2FA%3E%26nbsp%3B%20so%20in%20many%20instances%20i%20have%20experienced%2C%20it%20takes%20alot%20of%20effort%20to%20get%20Polycom%20SFB%20online%20qualified%20endpoints(%20Video%20codec%20and%20Desk%20SIP%20phones)%20to%20register%20to%20the%20SFB%20online%20server.%20Sometimes%20it%20is%20TIME%20settings%20related%20but%20in%20many%20failed%20occassion%20it%20has%20been%20said%20that%20some%20ports%20might%20need%20to%20be%20opened%20on%20the%20firewall.%20Do%20these%20ports%20stated%20in%20this%20article%20apply%20for%20initial%20client(%20Video%20codec%20and%20Desk%20SIP%20phones)%20registration%20and%20call%20setup%20purposes.%20Anybody%20with%20a%20similar%20experience%20with%20registration%20%3F%3F%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-106910%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-106910%22%20slang%3D%22en-US%22%3E%3CP%3EHi%2C%20so%20in%20many%20instances%20i%20have%20experienced%2C%20it%20takes%20alot%20of%20effort%20to%20get%20Polycom%20SFB%20online%20qualified%20endpoints(%20Video%20codec%20and%20Desk%20SIP%20phones)%20to%20register%20to%20the%20SFB%20online%20server.%20Sometimes%20it%20is%20TIME%20settings%20related%20but%20in%20many%20failed%20occassion%20it%20has%20been%20said%20that%20some%20ports%20might%20need%20to%20be%20opened%20on%20the%20firewall.%20Do%20these%20ports%20stated%20in%20this%20article%20apply%20for%20initial%20client(%20Video%20codec%20and%20Desk%20SIP%20phones)%20registration%20and%20call%20setup%20purposes.%20Anybody%20with%20a%20similar%20experience%20with%20registration%20%3F%3F%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-92422%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-92422%22%20slang%3D%22en-US%22%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F68386%22%20target%3D%22_blank%22%3E%40Josh%20Gillam%3C%2FA%3E%2C%20taking%20offline%20to%20understand%20the%20details.%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-89481%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-89481%22%20slang%3D%22en-US%22%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F15786%22%20target%3D%22_blank%22%3E%40Thomas%20Binder%3C%2FA%3E%26nbsp%3BIt%20appears%20to%20me%20that%20%22Share%20Desktop%22%20(and%20similar%20functions)%20still%20leverage%20the%2050000-59999%20port%20range.%20Is%20this%20the%20case%3F%20Is%20there%20a%20plan%20to%20update%20this%20function%20as%20well%20to%20use%20known%20ports%3F%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-82837%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-82837%22%20slang%3D%22en-US%22%3E%3CP%3EFirst%20of%20all%2C%20great%20article!%3C%2FP%3E%3CP%3ETo%20reiterate%20your%20comment%20directed%20to%20me%3A%20for%20Skype%20for%20Business%20Online%20Cloud%20PBX%2C%20the%20optional%2050%2C000%20port%20range%20has%20not%20fully%20implemented%20on%20all%20tenants%20and%20we%20should%20still%20consider%20it%2C%20but%20only%20later%2C%20correct%3F%C3%82%26nbsp%3B%20If%20so%20how%20will%20we%20know%20when%3F%26nbsp%3B%20I%20am%20asking%20from%20a%20(a)%20keep%20ports%20open%20perspective%2C%20but%20more%20so%20from%20a%20(b)%20QoSing%20perspective.%26nbsp%3B%20I%20am%20debating%20to%20switch%20to%20a%20port%20based%20QoSing%20for%20traffic%20prioritization%20in%20one%20of%20our%20sites%20verses%20the%20IP%20based%20QoS%20technique%20we%20are%20using%20now%20for%20call%20quality%2C%20but%20you%20comment%20makes%20me%20question%20if%20it%20is%20ready.%26nbsp%3B%20What%20do%20you%20recommend%3F%26nbsp%3B%20Currently%20we%20are%20doing%20QoSing%20for%20SfB%20Cloud%20PBX%20w%2F%20PSTN%20connection%20based%20on%20the%20IP%20address%20list%20here%3A%26nbsp%3B%3CA%20href%3D%22https%3A%2F%2Fsupport.office.com%2Fen-us%2Farticle%2FOffice-365-URLs-and-IP-address-ranges-8548a211-3fe7-47cb-abb1-355ea5aa88a2%3Fui%3Den-US%26amp%3Brs%3Den-US%26amp%3Bad%3DUS%26amp%3BfromARhttps%3A%2F%2Fsupport.office.com%2Fen-us%2Farticle%2FOffice-365-URLs-and-IP-address-ranges-8548a211-3fe7-47cb-abb1-355ea5aa88a2%3Fui%3Den-US%26amp%3Brs%3Den-US%26amp%3Bad%3DUS%26amp%3BfromAR%3D1%3D1%23bkmk_lyo%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3Ehttps%3A%2F%2Fsupport.office.com%2Fen-us%2Farticle%2FOffice-365-URLs-and-IP-address-ranges-8548a211-3fe7-47cb-abb1-355ea5aa88a2%3Fui%3Den-US%26amp%3Brs%3Den-US%26amp%3Bad%3DUS%26amp%3BfromARhttps%3A%2F%2Fsupport.office.com%2Fen-us%2Farticle%2FOffice-365-URLs-and-IP-address-ranges-8548a211-3fe7-47cb-abb1-355ea5aa88a2%3Fui%3Den-US%26amp%3Brs%3Den-US%26amp%3Bad%3DUS%26amp%3BfromAR%3D1%3D1%23bkmk_lyo%3C%2FA%3E%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-82758%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-82758%22%20slang%3D%22en-US%22%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F32515%22%20target%3D%22_blank%22%3E%40Daniel%20Koziupa%3C%2FA%3E%2C%20client%20port%20ranges%20can%20solve%20for%20parts%20of%20it%20--%2050%2C000-50%2C019%20for%20Audio%2C%2050%2C020-50%2C039%20for%20Video%20and%2050%2C040-50%2C059%20for%20Sharing%20--%20can%20solve%20for%20part%20of%20the%20problem.%20However%2C%20these%20ports%20are%20used%20only%20by%20PC%20and%20Mac%20client.%20In%20the%20future%2C%20you%20will%20be%20able%20to%20do%20taggijng%20based%20on%20destination%20port%20(3479%20UDP%20for%20Audio%2C%203480%20UDP%20for%20Video%2C%203481%20UDP%20for%20Sharing)%2C%20but%20the%20rollout%20to%20all%20customers%20will%20take%20some%20time.%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-82443%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-82443%22%20slang%3D%22en-US%22%3E%3CP%3EFor%20QoSing%20SfB%20Cloud%20PBX%2C%20would%20you%20recommend%20port%20based%20or%20IP%20traffic%20prioritization%3F%26nbsp%3B%20If%20port%20based%2C%20QoS%20TCP443%20would%20be%20bad%20since%20a%20lot%20of%20traffic%20rides%20on%20TCP%20443%2C%20no%3F%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-82416%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-82416%22%20slang%3D%22en-US%22%3E%3CP%3EThanks%20for%20the%20confirmation!%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-82380%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-82380%22%20slang%3D%22en-US%22%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F64483%22%20target%3D%22_blank%22%3E%40Christian%20Schindler%3C%2FA%3E%2C%20no%20the%20on-premise%20requirements%20are%20staying%20the%20same%20as%20this%20will%20not%20change%20server%20to%20server%20traffic.%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-82368%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-82368%22%20slang%3D%22en-US%22%3E%3CP%3EDoes%20this%20also%20affect%20federated%20connections%20from%20On-Premises%20Edge%20to%20SfB%20Edge%3F%20Thx%20Christian%20Schindler%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-78377%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-78377%22%20slang%3D%22en-US%22%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F62466%22%20target%3D%22_blank%22%3E%40Ajay%20Kakkar%3C%2FA%3E%2C%20the%20server%20does%20not%20require%20inbound%20(from%20the%20internet%20to%20the%20Edge%20Server)%20traffic%20on%20the%20range%2050%2C000-59%2C999%20for%20UPD%20or%20TCP%20since%20Office%20Communications%20Server%202007%20R2.%20The%20only%20time%20where%20it%20requires%20the%20port%20range%20is%20as%20a%20source%20port%20fro%20traffic%20from%20the%20AV%20Edge%20Server%20to%20the%20Internet.%20You%20can%20find%20the%20complete%20table%20above%20and%20I%20also%20recommend%20watching%20%3CA%20href%3D%22http%3A%2F%2Faka.ms%2Fsa-ice%22%20target%3D%22_self%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3ESkype%20for%20Business%20media%20flows%3C%2FA%3E%20for%20all%20the%20details.%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3Ehth%2C%3C%2FP%3E%0A%3CP%3Ethomas%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-78013%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-78013%22%20slang%3D%22en-US%22%3E%3CP%3EWhen%20will%20it%20be%20available%20for%20Skype%20for%20Business%20Server%3F%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-77315%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-77315%22%20slang%3D%22en-US%22%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Ftechcommunity.microsoft.com%2Ft5%2Fuser%2Fviewprofilepage%2Fuser-id%2F32438%22%20target%3D%22_blank%22%3E%40Martin%20Koenig%3C%2FA%3E%2C%20yes%20%2C%20this%20applies%20to%20all%20supported%20clients.%20As%20mentioned%20there%20might%20be%20some%20benefits%20with%20opening%20the%2050%2C000-59%2C999%20range%20when%20it%20comes%20to%20call%20setup%20times%2C%20if%20this%20is%20something%20you%20are%20worried%20about.%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-77267%22%20slang%3D%22en-US%22%3ERe%3A%20Simplified%20port%20requirements%20for%20Skype%20for%20Business%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-77267%22%20slang%3D%22en-US%22%3E%3CP%3EGreat%20stuff!%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EIs%20this%20explicitly%20true%20for%20Cloud-PBX%20certified%20IP%20Phones%20from%20Polycom%2FYealink%2Fetc%20aswell%3F%3C%2FP%3E%3C%2FLINGO-BODY%3E
Microsoft

Note: This article applies only to Office 365 Worldwide (including Government Community Cloud). For guidance on Office 365 operated by 21 Vianet, Office 365 Germany, Office 365 U.S. Government DoD or Office 365 U.S. Government GCC High click on the respective links.

 

We are happy to announce that the 50,000-59,999 port range (UDP and TCP) is no longer a requirement for Skype for Business endpoints to communicate with Skype for Business Online.

Earlier this year we talked about making simplification for network connectivity for Skype for Business Online (see blog article here) and we recently updated our guidance and removed the mentioned port range as a requirement: Office 365 URLs and IP address ranges

 

So which ports are required for clients?

All clients need to be able to directly connect to Skype for Business Online on the following destination ports: (the IP addresses and FQDNs can be found in the Office 365 URLs and IP address ranges)

  • TCP 80, 443
  • UDP 3478, 3479, 3480, 3481
  • Optional: UDP/TCP 50,000-59,999

 

Is there a minimum client version required to benefit from the port changes?

This change applies to all clients supported against Skype for Business Online. No clients are excluded and there are no specific minimum version required (although we always recommend to run the latest version).

 

Why are these ports not required anymore?

To answer this question, it is important to understand first how the 50,000-59,999 ports were used in the first place. (To understand all the details of their purpose, we recommend watching Troubleshoot media flows in Skype for Business across online, server and hybrid.)

Let's have the following example:

  • User A wants to call User B
  • For the sake of the example, the direct connection between User A and User B is blocked (e.g. User and User B are at different branch offices behind firewalls), so the media traffic cannot go directly peer to peer and needs to flow via Skype for Business Online
  • There are now the following possible media paths
    • The 50,000-59,999 port range can be leveraged to include only a single Relay Server in the media path
    • Without the 50,000-59,999 port range, the traffic needs to travel via two Relay Server.

As you can see, closing the 50,000-59,999 port range will force the traffic to travel via an additional hop. While logic tells us that usually we want to avoid additional hops under all circumstances, the analysis on call quality data has shown us, that this additional hop does not significantly affect call quality - since both these Relay Servers are homed on the Microsoft Network, all traffic between the Relay Servers is sent over a highly reliable pipe designed for real-time communication.

 

Our organization has these ports open, should we close them?

Having the 50,000-59,999 port range open can still have (some) benefits when it comes to call setup times and under some circumstances on call quality. However in our data analysis and pilot deployments with some customers these differences did not show significance. If you have the ports open today, it makes sense to leave them open.

 

What does this change for hybrid between Skype for Business Server and Skype for Business Online?

This change only applies to users who are homed in Skype for Business Online. If you have an on-premises deployment of Skype for Business, the requirements for your Edge Server to communicate to Skype for Business Online remain unchanged (and also for any Federation scenarios including Skype for Business on-premises).

The A/V Edge Server in your environment will need to be configured liked this. Please note that the Source Port is only relevant, if your firewall requires a source port to be specified (and a lot of firewalls do not require this setting):

Source IP

Destination IP

Source Port

Destination Port

A/V Edge service interface

Any

UDP 3478

UDP 3478

A/V Edge service interface

Any

TCP 50,000-59,999

TCP 443

Any

A/V Edge service interface

Any

UDP 3478

Any

A/V Edge service interface

Any

TCP 443

 

Full requirements for Skype for Business Edge Server can be found here: Edge Server environmental requirements in Skype for Business Server 2015.

 

Does this change anything for Cloud Connector Edition?

No, the requirements for Cloud Connector Edition (see Plan for Skype for Business Cloud Connector Edition) remain unchanged.

 

Call to Action

  1. Celebrate about the simplified port requirements
  2. Update any design templates you might have
  3. For future deployments, open only TCP 80, 443 and UDP 3478, 3479, 3480, 3481 per new guideline (and, optionally, 50,000-59,999 UDP and TCP)

If you have any questions or comments, please let us know in the community

 

This post is brought to you by Skype Academy. Visit Skype Academy for technical trainings and readiness around the Skype Operations Framework.

63 Comments
Deleted
Not applicable

 @Thomas Binder I'm performing some wireshark traces and I see traffic from the Skype for business online service coming in on the new UDP ports however my client continues to use the high ports. My client is Skype for Business 2016 MSO (16.0.9029.2106). Can help me understand what would be preventing it from utilizing the new ports?

 

I ran the connectivity test and here is one of the entries:

Starting Connectivity checks
Relay : 13.107.64.2 is reachable using Protocol UDP and Port 3478

Microsoft

@Deleted, the Skype for Business client will always communicate to its own relay via 3478 UDP (respectively 443 TCP if using TCP), however when talking to the relay of the person (or conferencing server) the client wants to talk to, it will still leverage the 50,000-59,999 UDP/TCP port range if the port range is open. If the port range is closed, it will always talk to its own relay via 3478 UDP and traffic will be relayed from there to either directly the other end point or the relay of the other endpoint.

 

Summary: it is expected for the client to use 50,000-59,999 UDP/TCP if it can. If it can't it will still work and be fully supported.

Deleted
Not applicable

@Thomas Binder thank you for the feedback. I was wondering if I needed to update the group policy for Qos to use the new ports?

 

  • Audio
    • Ports 50,000-50,019 (Source)
    • DSCP marking of 46
  • Video
    • Ports 50,020-50,039 (Source)
    • DSCP marking of 34
  • File Transfer
    • Ports 50,040-50,059 (Source)
    • DSCP marking of 18
  • Application Sharing
    • Ports 50,040-50,059 (Source)
    • DSCP marking of 18
Microsoft

@Deleted, no need to change the QoS policy as they client ports remain unchanged. 3478 UDP, 443 TCP and 50,000-59,999 UDP/TCP are referring to the service port.

Deleted
Not applicable

@Thomas Binder Thank you very much for clarifying. 

New Contributor

@Thomas Binder- for federation between skype online organization with skype on premise organization, is it required to open 50000-59999 ports? 

 

and if we are allowing all office 365 ips on our firewall, do we also need to allow FQDNs?

Microsoft

@Abhinay Sharma, yes as laid out in the table above you need for TCP the 50,000-59,999 as source -- so this is only relevant if you are configuring source ports on your firewall. And yes, you need to open the IPs and the FQDNs.

New Contributor

@Thomas Binder-thanks for the response Thomas, just one more thing, need to know if we need to open 50,000-59,999 (TCP/UDP) as destination port?

 

Microsoft

@Abhinay Sharma, 50,000-59,999 UDP/TCP are not required as destination ports.

Frequent Contributor

What is the port requirements for P2P calls?

UserA: OnPrem Skype user.

UserB: Skype Online user.

 

In case UserA locates in site 1 and UserB locates in site 2 but there is a FW between them. How we could allow the P2P calls for them? At the moment, when UserA is calling to UserB I can see UserB gives 50k port back to UserA. While UserA offers the candidates based on the conferecing configuration on the on-premises Skype.

 

If I read this: You can't connect to Skype for Business Online, or certain features don't work, because an on-premis... you perhaps could read from between lines P2P is using:
Audio (UDP/TCP): 50000 - 50019
Video (UDP/TCP): 50020 - 50039
Desktop Sharing (UDP/TCP): 50040 - 50059

 

Microsoft

@Petri X, Skype for Business Online should sue on the client side always the following ports:

Audio (UDP/TCP): 50000 - 50019
Video (UDP/TCP): 50020 - 50039
Desktop Sharing (UDP/TCP): 50040 - 50059

 

For Skype for Business Server you can configure which ports to use. I would recommend using the same port ranges.

 

hth,

thomas

Occasional Visitor

We have all ports opened on our firewall and also matched the same with results of connectivity analyser, but still Skype for business consult and transfer is failing for one of our client. They are using SFB Phone Numbers, and in this scenario the main number is receiving call from external user and then a consult and transfer from main number to an internal user is failing with error "Transfer Failed", normal blind transfer works fine. We are using the MS recomended Yealink Phone (Yealink TS 48S) with the MS approved firmware on it.

Microsoft

@Shebin_CMGi123, I recommend to open a case with support.