Before you go ahead and try the steps outlined in this article, know that arbitration mailboxes should be moved to a different server provided you have one. My organization hosts only a single Exchange 2013 server. ####################### Error: Uninstall can’t continue. Database Mailbox Database 0912423282 : This mailbox database contains one or more mailboxes, mailbox … Continue reading Exchange 2013 uninstallation fails with arbitration mailbox error