Hey everyone! I'm facing a strange issue with Microsoft 365. I recently updated a user's surname and changed their email alias in our local Active Directory from ..sz`@...` to ..sch`@...`. The `proxyAddresses` in AD is correct now, but the old alias still appears in Exchange Online and the Microsoft 365 admin center. Even though the delta sync with Azure AD Connect runs without any hitches and adds new aliases, the old one just won't go away. I checked using `Get-ADObject` in local AD with a filter for `proxyAddresses`, and I couldn't find any trace of the old alias. I can't even remove it manually in Exchange Online since it says it's managed in AD. Has anyone run into this issue before? Any tips on how to get rid of this stubborn alias that's still showing up in the cloud? I'd really appreciate any help! 🙂
1 Answer
Have you checked what their User Principal Name (UPN) looks like in on-prem AD? If it ends with 'sch', that should reflect the correct updated alias. Sometimes the issue could be tied to how UPNs map to email addresses.
Yeah, the on-prem UPN does end in 'sch', so that part's correct!