This may be the wrong forum, but I have a question about licensing Exchange Server. I know that when you purchase Windows XP license, you can actually load earlier versions of Windows (legally) using the newer license. Since Exchange 2003 is not available for purchase, can I do the same thing with Exchange? We are running a network that has only authorized Exchange 2003 for deployment. I don't want to buy the 2007 license if it won't help me out. If you can reference actual data from Microsoft on this issue, it would be much appreciated. Thanks for any assistance anyone can provide. Ed