I have a user that uses Outlook 2003, in conjunction with Exchange 2003, and is currently having all of the mail going to the unread box. This is an isolated incident as far as I know. There aren't any rules or delegates assigned on the account. I'm not sure if this would be on the server side or the application side. I'm assuming it would be on the application side since this behavior is isolated to one user but, I have learned that I shouldn't assume anything.
Any ideas what might be causing this to be occurring?