Forum Discussion
Exchange Hybrid Mailbox Migration - RecipientNotFoundPermanentException
Tried a lot of things to get this working.
In the end this worked out.
-Remove the Migration for the affected user.
-Remove the Mail user from the Organization\Retention Hold setup in Security and Compliance.
-Take backup of any OneDrive or any other data that exist for this user.
-Move the user into non Syncing OU in On Premise Exchange.
-Run the Delta Sync on the AAD connect Server Start-Adsyncsynccycle –PolicyType Delta
-Remove the MSOL user from the Recycle Bin: Remove-MsolUser -UserPrincipalName mailto:user@contoso.com -RemoveFromRecycleBin –Force
-Once done move the user back to syncing OU and run the Delta sync again on the AAD connect Server : Start-Adsyncsynccycle –PolicyType Delta
-Once the new mail user is synced to Office 365 begin the migration again for the affected user
Hi, is the test mailbox linked to the email address policy, and has the "user@domain.mail.onmicrosoft.com" attribute included as an email address? The migration will certainly fail without this.