I have a client running Office 2003, backend server is Exchange 2007 SP1.
He received the original meeting and accepted it, meeting details got
dropped into the calendar no problem. Then the meeting organizer
re-scheduled it and he received a new invitation but the meeting didn't get
moved to the new date. If he double-clicks on the event details in his
Inbox, he sees the new date but the summary line says "This appointment
occurs in the past".