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Custom/vanity domain name configuration in Exchange Online

%3CLINGO-SUB%20id%3D%22lingo-sub-169950%22%20slang%3D%22en-US%22%3ECustom%2Fvanity%20domain%20name%20configuration%20in%20Exchange%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-169950%22%20slang%3D%22en-US%22%3E%3CP%3ECurrently%2C%20when%20users%20'Add%20account'%20in%20Microsoft%20Outlook%202016%2C%20the%20users%20are%20automatically%20configured%20(possibly%20through%20autodiscovery)%20to%20connect%20to%20'%3CA%20href%3D%22https%3A%2F%2Foutlook.office365.com%2Fmapi%2Fnspi%2F%3FMailboxId%3Dxxx-yyy-zzz%40contoso.com%22%20target%3D%22_blank%22%20rel%3D%22nofollow%20noopener%20noreferrer%20noopener%20noreferrer%22%3Ehttps%3A%2F%2Foutlook.office365.com%2Fmapi%2Fnspi%2F%3FMailboxId%3Dxxx-yyy-zzz%40contoso.com%3C%2FA%3E'%20exchange%20server.%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3EHowever%2C%20I%20would%20like%20them%20to%20be%20automatically%20configured%20to%20connect%20through%20our%20vanity%20URL%2C%20like%26nbsp%3B'%3CA%20href%3D%22https%3A%2F%2Fexchange.server.consoto.com%2Fmapi%2Fnspi%2F%3FMailboxId%3Dxxx-yyy-zzz%40contoso.com%22%20target%3D%22_blank%22%20rel%3D%22nofollow%20noopener%20noreferrer%20noopener%20noreferrer%22%3Ehttps%3A%2F%2Fexchange.server.consoto.com%2Fmapi%2Fnspi%2F%3FMailboxId%3Dxxx-yyy-zzz%40contoso.com%3C%2FA%3E'.%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3EAnd%20I%20would%20like%20the%20same%20with%3A%3C%2FP%3E%0A%3CP%3E1)%20For%20SMTP%3A%20smtp.contoso.com%3A587%20%3CSTRONG%3Einstead%20of%3C%2FSTRONG%3E%20smtp.office365.com%3A587%3C%2FP%3E%0A%3CP%3E2)%20For%20POP%2C%20IMAP%20and%20Exchange%20Online%3A%20exchange.server.contoso.com%20%3CSTRONG%3Einstead%20of%3C%2FSTRONG%3E%20outlook.office365.com%20(with%20the%20respective%20ports)%3C%2FP%3E%0A%3CP%3E3)%20For%20OWA%3A%26nbsp%3B%3CA%20href%3D%22https%3A%2F%2Foutlook.contoso.com%2Fowa%2F%26nbsp%3B%22%20target%3D%22_blank%22%20rel%3D%22nofollow%20noopener%20noreferrer%20noopener%20noreferrer%22%3Ehttps%3A%2F%2Foutlook.contoso.com%2Fowa%2F%26nbsp%3B%3C%2FA%3E%3CSTRONG%3Einstead%20of%3C%2FSTRONG%3E%20%3CA%20href%3D%22https%3A%2F%2Foutlook.office.com%2Fowa%2F%22%20target%3D%22_blank%22%20rel%3D%22noopener%20noreferrer%20noopener%20noreferrer%22%3Ehttps%3A%2F%2Foutlook.office.com%2Fowa%2F%3C%2FA%3E%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3EHow%20can%20this%20be%20configured%3F%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3EThanking%20you%2C%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-LABS%20id%3D%22lingo-labs-169950%22%20slang%3D%22en-US%22%3E%3CLINGO-LABEL%3EExchange%20Online%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3EExchange%20Server%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3EHybrid%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3EOffice%20365%3C%2FLINGO-LABEL%3E%3C%2FLINGO-LABS%3E%3CLINGO-SUB%20id%3D%22lingo-sub-170053%22%20slang%3D%22en-US%22%3ERe%3A%20Custom%2Fvanity%20domain%20name%20configuration%20in%20Exchange%20Online%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-170053%22%20slang%3D%22en-US%22%3E%3CP%3ESuch%20configuration%20is%20only%20possible%20if%20you%20are%20using%20on-premises%20Exchange%20server.%20In%20Exchange%20Online%20the%20endpoints%20are%20fixed%20and%20you%20cannot%20change%20them.%20You%20can%20easily%20create%20a%20solution%20for%20%233%20though%2C%20by%20creating%26nbsp%3B%20CNAME%20with%20the%20corresponding%20value%20and%20using%20it%20to%20redirect%20to%20the%20O365%20OWA%20endpoint.%3C%2FP%3E%3C%2FLINGO-BODY%3E
Haneef Ibn Ahmad
Contributor

Currently, when users 'Add account' in Microsoft Outlook 2016, the users are automatically configured (possibly through autodiscovery) to connect to 'https://outlook.office365.com/mapi/nspi/?MailboxId=xxx-yyy-zzz@contoso.com' exchange server.

 

However, I would like them to be automatically configured to connect through our vanity URL, like 'https://exchange.server.consoto.com/mapi/nspi/?MailboxId=xxx-yyy-zzz@contoso.com'.

 

And I would like the same with:

1) For SMTP: smtp.contoso.com:587 instead of smtp.office365.com:587

2) For POP, IMAP and Exchange Online: exchange.server.contoso.com instead of outlook.office365.com (with the respective ports)

3) For OWA: https://outlook.contoso.com/owa/ instead of https://outlook.office.com/owa/

 

How can this be configured?

 

Thanking you,

1 Reply

Such configuration is only possible if you are using on-premises Exchange server. In Exchange Online the endpoints are fixed and you cannot change them. You can easily create a solution for #3 though, by creating  CNAME with the corresponding value and using it to redirect to the O365 OWA endpoint.

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