Remove shared mailbox in a hybrid environment

If I click delete on the shared mailbox in Office 365 Exchange I get this error

"The following error occurred during validation in agent 'Windows LiveId Agent': 'Unable to perform the save operation. 'Sharetest' is not within a valid server write scope" 

Alternatively click delete on the shared mailbox in on-premise exchange i get error

"isn't a mailbox user."

Solution

We can try to delete the shared mailbox using local PowerShell (EMS) cmdlet:

Remove-remotemailbox –identity shared@domain.com

After that, please start forcing Dirsync to wait for the changes.

Alternatively, we can delete the AD user, and run ADsync. It will delete the user and shared mailbox in Office 365 via ADsync.