We are currently in the process of migrating from Exchange 2003 to Exchange 2007. All of the Exchange 2003 mailboxes have been migrated to Exchange 2007 except the Administrator mailbox. When I try to move the administrator mailbox to Exchange 2007, I receive the following error.
Database is mandatory on UserMailbox. It was running command 'move-mailbox -TargetDatabase '<Ex2k7Mailbox>\<storage group>\<mailbox>
What do I need to do to move the administrator mailbox to the Exchange 2007 server?