Having trouble with old directory names for Exchange mailboxes. For instance, in Outlook, typing in a person's name, sometimes type-ahead shows an old name for the directory name: ie: FirstName <oldfirstname> with the oldfirstname being the original owner of the mailbox. So users see "Sam <DAVE>".
Also, with EXMERGE, the mailbox list shows "Sam Smith <DAVE>".
How do I change the directory name "DAVE"?
If the outdated name did not show in Outlook, it might not matter much, but I will also be migrating mailboxes at some point and it would be real nice if the Users' names and mailbox names matched.