I spoke with a developer here at WWDC who is deploying Exchange 2007. He said that the Linux/UNIX folks on Evolution are finding it impossible to use due to some kind of webdav issues introduced with Exchange 2007.
I’ve not yet had a chance to test/play with this to look into it deeper. I will get a chance to do so next month. However, as I said before, Exchange 2007 introduced web services for working with your mail and that’s where Evolution needs to go. Webdav is officially deprecated in 2007 and will be completely absent from the next Exchange server. Evolution needs to uhh… evolve.
Maybe 2007 SP1 will fix some of the webdav issues in the meantime.