I am running ZCO 5.0.5 and server 5.0.5. I have had two users (who use Outlook 07) complain of a calendar event they organized disappearing from their calendars. However, it shows up on the attendees calendars. I grepped some mailbox logs on the server and I don't see any reference of the event ever actually being added to their calendar -- though I have found it being added to the attendees. Any ideas as to why this would happen? Any one else run in to this issue?