Skype For Business On-premise Hybrid with existing sub-domain in O365

%3CLINGO-SUB%20id%3D%22lingo-sub-1439887%22%20slang%3D%22en-US%22%3ESkype%20For%20Business%20On-premise%20Hybrid%20with%20existing%20sub-domain%20in%20O365%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-1439887%22%20slang%3D%22en-US%22%3E%3CP%3EHello%2C%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EWe%20have%20a%20sip-domain%20%22contoso.com%22%20on-premise%20and%20our%20students%20have%20%22students.contoso.com%22%20sip-domain%20located%20in%20SfB%20Online%20only.%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EJust%20tried%20to%20setup%20Skype%20For%20Business%20On-premise%202015%20to%20a%20hybrid%20with%20Office365.%20Everything%20worked%20except%20federation%2Fpresence%20status%20from%20cloud%20domain%20(students.contoso.com)%20to%20on-premise%20domain.%3C%2FP%3E%3CP%3EAfter%20I%20ran%20a%20debug%20I%20encountered%20this%20error%3A%3C%2FP%3E%3CP%3E%22ms-diagnostics%3A%201017%3B%20reason%3D%22Cannot%20route%20From%20and%20To%20domains%20in%20this%20combination%22%3B%20summary%3D%22Domain%20type%20analysis%20indicates%20that%20the%20ms-split-domain-info%20header%20in%20the%20message%20is%20the%20wrong%20type%E2%80%9D%22%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EWhich%20pointed%20me%20to%20the%20MS%20article%20here%3A%3C%2FP%3E%3CP%3E%3CA%20href%3D%22https%3A%2F%2Feur03.safelinks.protection.outlook.com%2F%3Furl%3Dhttps%253A%252F%252Fdocs.microsoft.com%252Fen-us%252Fskypeforbusiness%252Ftroubleshoot%252Fhybrid-im-presence%252Fsfb-online-users-cant-im%26amp%3Bdata%3D02%257C01%257Clarsta%2540trondelagfylke.no%257C51368faff89e461fc73b08d8081518b5%257Cb6334d0113b94531a3a6532e479d9a1a%257C0%257C0%257C637268233981698460%26amp%3Bsdata%3DwQQRz9V8mHQFpEr%252FykQ3vKn59nd284zhN0ccU5ofUfw%253D%26amp%3Breserved%3D0%22%20target%3D%22_blank%22%20rel%3D%22noopener%20nofollow%20noopener%20noreferrer%20noopener%20noreferrer%22%3Ehttps%3A%2F%2Fdocs.microsoft.com%2Fen-us%2Fskypeforbusiness%2Ftroubleshoot%2Fhybrid-im-presence%2Fsfb-online-users-cant-im%3C%2FA%3E%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3ESo%20my%20question%20to%20you%20guys%2C%20to%20get%20this%20working%20from%20what%20I%20understand%20I%20need%20to%20take%20%22students.contoso.com%22%20in%20public%20facing%20certificates%20on%20my%20on-premise%20edge%20and%20I%20also%20need%20to%20point%20federation%20DNS%20records%20to%20this%20domain%20on-premise.%20But%20what%20about%20other%20DNS%20records%3F%20Should%20this%20domain%20be%20a%20part%20of%20my%20topology%3F%20How%20much%20work%20do%20I%20need%20to%20do%20internal%20with%20simple%20urls%2C%20dns%2C%20certificates%20and%20so%20on.%20All%20our%20users%20in%20this%20domain%20will%20still%20contain%20Online.%3C%2FP%3E%3CP%3EI%20struggled%20to%20find%20this%20scenario%20exactly%20online.%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CP%3EAny%20answers%20would%20be%20much%20appreciated.%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-LABS%20id%3D%22lingo-labs-1439887%22%20slang%3D%22en-US%22%3E%3CLINGO-LABEL%3ESkype%20for%20Business%202015%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3ESkype%20for%20Business%20Hybrid%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3ESkype%20for%20Business%20Online%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3ESkype%20for%20business%20online%20migration%3C%2FLINGO-LABEL%3E%3C%2FLINGO-LABS%3E
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Senior Member

Hello,

 

We have a sip-domain "contoso.com" on-premise and our students have "students.contoso.com" sip-domain located in SfB Online only.

 

Just tried to setup Skype For Business On-premise 2015 to a hybrid with Office365. Everything worked except federation/presence status from cloud domain (students.contoso.com) to on-premise domain.

After I ran a debug I encountered this error:

"ms-diagnostics: 1017; reason="Cannot route From and To domains in this combination"; summary="Domain type analysis indicates that the ms-split-domain-info header in the message is the wrong type”"

 

Which pointed me to the MS article here:

https://docs.microsoft.com/en-us/skypeforbusiness/troubleshoot/hybrid-im-presence/sfb-online-users-c...

 

So my question to you guys, to get this working from what I understand I need to take "students.contoso.com" in public facing certificates on my on-premise edge and I also need to point federation DNS records to this domain on-premise. But what about other DNS records? Should this domain be a part of my topology? How much work do I need to do internal with simple urls, dns, certificates and so on. All our users in this domain will still contain Online.

I struggled to find this scenario exactly online.

 

Any answers would be much appreciated.

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