We have a web app that produces ical standard calendar events (.ics files that contain a single event) and when these are forwarded from the application's mail server to our corporate exchange server, the exchange server converts these files to .msg type essetially making them useless for our purposes. Can anyone shed some light why the exchange server would do this conversion? Our problem is similar to http://support.microsoft.com/kb/925873 but we're dealing with single event files. Thanks in advance!