I'm doing some contract work for this guy who has contracts with multiple companies in my area. One of the companies has a setup of 1 NT4 DC and 1 W2K server. Currently they are using good ole MS Mail and want to continue using it. They wanted to be able to do group scheduling...so the guy suggested Exchange 2003 (a little overkill I know). The software arrives and will not install on the 2K box because its on an NT Domain with no AD. I suggested upgrading the NT box to 2k which he does not want to do. I also suggested using Ex 5.5 instead which is not an option either. He mentioned creating 2 domains...keeping the NT4 Domain intact and then setting the 2K box up as a DC and installing EX 2003 on it. I'm not sure if that will work. Any ideas?