Deleted mail remains in Inbox
 

I have a user who reads mail directly from his Unread Mail folder. He
then deletes the mail using the "x" delete button on the open mail
toolbar, but instead of sending the (now marked read) mail to the
Deleted Items folder, they remain in the Inbox.

I created a new profile for him and the problem went away for a few
days. Now it's back.

He is not using any kind of synching device. He is using Outlook 2003
with mail from our Exchange 2003 server. I've tried restoring the
default values on the Unread Mail folder, but that made no
difference. His reading pane options are to mark an item as read when
the selection changes, if that makes a difference.

If anyone has an idea what to try next, I'd sure be grateful.

Thanks!