SMTP-addresses not in sync with AD

We have an AADSync enabled tenant syncing the users to Office 365 and have ADFS running. We have NO Exchange hybrid setup. Mailboxes are on-premises Exchange. I accidently created for some users a ...

exchange

office 365

VasilMichev
Feb 28, 2018
You should be able to use the -WindowsEmailAddress parameter for this. The new address you specify should be set as the Primary SMTP, while the old primary one will be kept as secondary. The cmdlet will also work against synced users.

If that's not a viable solution for your scenario, you can force-delete the mailbox in O365 and provision the object anew. Use the method outlined here for fastest resolution: https://blogs.technet.microsoft.com/exchange/2018/01/17/permanently-clear-previous-mailbox-info/

Nathan McClintock

Copper Contributor

Mar 01, 2018

How about the Set-MsolUserPrincipalName command?

Jonathan Klein-Wiele
Copper Contributor
Mar 06, 2018
Thanks for your feedback, I tried all your hints but none worked... But we will move in the next weeks to hybrid and I hope problems are gone then.
- Pablo R. Ortiz
  Steel Contributor
  Mar 06, 2018
  if you don't comnpletely remove the EXO created mailboxes, Hybrid/Migration won't work for those

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SMTP-addresses not in sync with AD