In the home stretch of our migration at this point. Accounts in several affiliate domains are impacted. The mailboxes still in 2003 stores are most likely orphaned but we need to be sure. Taking into account managers with permissions to mailboxes of terminated employee's, I'm looking for the best way to verify that a mailbox is not needed and can be passed over for migration. Monitoring software has caused last accessed time to be updated so I can't use that.
Thanks in advance!