Exchange: Lingering/Orphaned In-Place Holds on mailboxes blocking cleanup/moves.

This blog post covers two different scenarios when an In-Place Hold is removed off an eDiscovery Mailbox Search, but that corresponding entry is not cleaned up properly on the mailboxes formerly targeted by that Mailbox Search. When this happens, you can’t remove the Mailbox Search and you also can’t migrate mailboxes back to older versions…