I’m not really familiar with Evolution so just a couple of generic suggestions I’m afraid.
It might be worth looking through some of the logs on your system to see if anything is reported.
Another idea is to use something like wireshark to trace the comms between your pc and the exchange server to find out where it is crashing.
Is there an Evolution IRC chat at #evolution on irc.gimp.org. Some mailing lists (see Evolution), a Novell support forum and newsgroup. So I would suggest trying in one or more of those.
Sorry I can’t help more - let us know if you find anything in the logs though.