I have 3 users with Iphone 5 that sync their mail, and contacts fine with our Exchange Server 2007 and back to their Outlook 2010 in there pc:s (Windows 7). What doesn't work is the sync of the calendar. If they put a new meeting in the calendar on their pc it syncs fine to the phone, but in the other direction it doesn't work, no update of the meeting in the phone to the Outlook calendar.
Another user has a Iphone 4 and it works perfect 100% in both directions.
So this seems to be some special issue with Iphone 5.
What to do?