I’m seeing an interesting, and seemingly recurring issue with one particular user’s Exchange calendar.  The complain is always that when a new appointment is added to the calendar, it disappears a minute or two later.  The event log on the Exchange Server always shows these errors:

Calendaring agent failed with error code 0×80040215 while saving appointment.

Calendaring agent failed to update the free/busy cache during an appointment save or delete operation.

Calendaring agent failed in message save notification with error 0×800703eb on XXXX@jfbc.org: /Calendar/test.EML.

I’ve tested, researched, tried to reproduce, etc, etc and am at a loss as to what’s causing this.  The only thing I can think of is maybe it’s related to syncing the users Palm Pilot.  Maybe the Palm device is allowing something to be input that Exchange doesn’t like?

I have figured out that there is some corrupt record that exists in the mailbox that’s causing this.  Moving the mailbox to another database and then back clears things up for a while, then it pops back up.  I’m curious if anyone else out there has seen anything like this?