Not sure how to fix this, had no problem moving a mailbox to a new database before, but trying to move a mailbox to a new database and it is stuck at syncing and when I check the status, I see the following error - StalledDueToTarget_MdbReplication. I have checked both the databases on the DAG and there are no health issues and copy queue length is 0. I have tried to move 2 separate mailboxes on separate databases and the same thing is happening. I have also tried from both the Web GUI and powershell and they both seem to stall at the same 37%. I have also verified that the Migration Mailbox is listed when checking for the Arbitration mailbox. I am not sure what else to check, but seems I cannot migrate any mailboxes at this point. Anyone have any suggestions on what could be causing this issue?
Exchange 2016 - 2 DAG groups - 4 Servers - Hybrid mode with all mailboxes on-prem. Tried to move a mailbox from each DAG and have the same problem on both of them.