Forum Discussion
Teams with Internal UPN problem
jfrobs If you have an internal domain like domain.local you can add alternative UPN suffixes.
https://docs.microsoft.com/en-us/office365/enterprise/prepare-a-non-routable-domain-for-directory-synchronizationIf you have multiple e-mail domains or SIP domains you should add them all as UPN suffixes so that you can have the same address for UPN, e-mail and SIP.
I don't think that is possible. The recommendation is that e-mail address and SIP-address (Teams address) should match the UserPrincipalName. It will be easier for users if they match (as you noticed).
Yes but very difficult to change my Internal Domain... LinusCansby
jfrobs If you have an internal domain like domain.local you can add alternative UPN suffixes.
https://docs.microsoft.com/en-us/office365/enterprise/prepare-a-non-routable-domain-for-directory-synchronizationIf you have multiple e-mail domains or SIP domains you should add them all as UPN suffixes so that you can have the same address for UPN, e-mail and SIP.
