this is all it says: " fatal error: QuotaExceededException has occurred", it does not specify what mailbox but I assume it is the destination mailbox on Office. I have gone into that users account and enabled the archive mailbox in Office365, it seems like the easiest and quickest way to clean up the mailbox and create more space. I have 6 of 8 mailboxes synced, with 1 still syncing 20hrs later and the 1 with the failed error. After enabling the Archive mailbox on Office, I have restarted the migration batch and both say syncing. I am going to hope they are synced by tomorrow. If there is a case where a mailbox just won't complete sync, what are the ramifications of just changing MX records and redirecting client Outlooks apps to the new server? Would I just be losing older emails since it syncs from recent to old? How long should I wait for sync to complete successfully? Thanks for your help !!!!!!!!!!