I have a user on Exchange running Outlook 2007. Whenever she checks mail, her incoming Exchange mail is automatically moved to a local Inbox, rather than staying in the Exchange server Inbox. I've checked Rules but there are absolutely none in place. I also checked the Auto Archive settings to make sure there aren't any crazy settings there, and turns out it is turned off altogether. The only other suggestion I've found on the web is to check "mail list manager", but I believe that only exists in Entourage.
Thanks very much!