I have a workstation running XP Pro SP2 with all patches running Office 2003 with all patches applied. Email comes into the Inbox and suddenly has started disappearing from the Inbox after 15 minutes or so. The emails will be there, then you'll move back over to working in another application, but when you maximize Outlook all of the new messages since 3/30 will be gone. Now it appears to be removing from the exchange server as well. If I login via OWA the mailbox shows all of the messages from 3/30 and before, but nothing new. Any ideas on where to start with this one?