Here is the set-up and issue we have
Exchange 2003 SP2 server
Outlook 2003 SP1 clients - Non cached mode
We had one user who was away from their desk, outlook open on his PC and without warning his outlook started sending out lots and lots of old random meeting requests/invitations to internal and external recipients again; at the same time reminders, some 3 years old, re-appeared on the users outlook. The users sent items is full off these invitiaion requests, about 50 sent within a 10 minute period, again some of these were 3 years old.
We rebooted the exchange server at the time and this didn't fix the issue, although since the issue appears to have fixed itself.
If anyone has any idea on where to look for the cause and possible fix to stop this happening again i would love to hear it.
Thanks in advance.