I wanted to see what the rules are for using Exchange System Manager 2003 against a native Windows/Exchange 2000 domain. We have several applications that require ESM to be installed, specifically our VoIP system. The next update for our VoIP system requires it to be run on a WIndows 2003 server. I have found that with ESM 2000 on Windows 2003 server you can't install any Exchange 2000 updates beyond SP3. Also if I need to run /forestprep for Exchange 2003 before I can do this will this affect my all Exchange 2000 enviroment in anyway?
