Jul 11 2019
- last edited on
Jan 14 2022
I know that the UPN should be set to the same value as the email address for many reasons, but I can't find the official documentation from Microsoft where they recommend this. Can someone please point me to it?
Jul 11 2019 11:59 PM
@Dean Gross Haven´t found any more in-depth statement. But in the article about Alternate ID there is a note stating: "Microsoft’s recommended best practices are to match UPN to primary SMTP address. This article addresses the small percentage of customers that cannot remediate UPN’s to match."
Hope this helps!
Jul 12 2019 12:01 AMSolution
I don't think there's anything "official" official. It's mentioned as "best practice" in multiple articles, for example here: https://docs.microsoft.com/en-us/office365/admin/add-users/change-a-user-name-and-email-address?view...
In reality, it depends on the workload and the client app. Some of them have a proper understanding of the difference between UPN and SMTP address, others "assume". Microsoft does enforce it for some endpoints though, for example when making changes via the O365 Admin Center. They also have a requirement that at least one of the smtp addresses should match the UPN in O365 (not necessarily the primary one though).
May 30 2021 06:24 PM
Jan 18 2022 08:42 PM
@Dean GrossI think this may be the reference you are looking for:
A UPN is an Internet-style login name for a user based on the Internet standard RFC 822. The UPN is shorter than a distinguished name and easier to remember. By convention, this should map to the user's email name. The point of the UPN is to consolidate the email and logon namespaces so that the user only needs to remember a single name.