it's the iso image from their website! I received the dvd from MS a couple of days ago and it works perfectly! I tried the iso image for enterprise and standard off of the website and both don't work. It's strange, It's been almost a month since the release, and MS hasn't fixed it? Makes me think that Exchange 2007 might turn out to be a flop! So far the management console is worse than any other Exchange console that I've seen before!