I\'ve seen this question asked several times on the web, but cannot find an answer.
When I create an appointment (meeting) using managed EWS 2.0, the invitation email co
I realize that this is a frustrating answer, but I believe this to be an Exchange bug. No matter how you adjust the various time zone properties exposed by the API, this behavior still occurs. As far as I can tell, there aren't any server-level settings that would affect this either, although I admittedly haven't combed through all of them.
In my case, what seems to go along with the appended UTC time is that the message is changed from its original HTML to a plain text version upon update. That bug (http://support.microsoft.com/kb/2689810) has been fixed, but my organization hasn't applied the patch yet. It's possible, I suppose, that this bug was rendered obsolete when the other was fixed. If installing an update on your Exchange server is an option, then that might be worth a shot.