This problem has been going on since at least Monday of this week, possibly starting Sunday 3/11. My calendar does not sync with my Exchange server account. Emails sync, Contacts sync, but the calendar keeps reporting "Exchange sync error. Synchronization is experiencing a problem". That's the only message I see, plus the red ! mark beside the Calendar word in my Exchange ActiveSync settings screen. The calendar is syncing "new" and "old" appointments between other computers accessing the calendar. Suggestions?