Hi @Ardan Zaki ,
Have you tried moving the mailbox to another target database and see it can help?
Besides, below are other troubleshooting steps that you could try:
- Disable content indexing on the target database with the command Set-MailboxDatabase <TargetDatabase> -IndexEnabled $false and then try it again.
- Suspend the move request for a while, and then resume it afterwards.
- Remove and then recreate the move request.
Regards
Shaofan
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