When the Exchange wrapper is run against appointments, who will the updated dates be "from"?

Q: When the Exchange wrapper is run against appointments, who will the updated dates be "from". Also, when a client opens, or agrees to the updated appointment, must they have the DST patch? If they aren't patched, will the appointment be saved correctly?
A: the appointment will be from the originator. The end client doesn't have to be patched. if they aren't it will be save at the wrong time but once they are updated the appoint will move automatically to the correct time.