I am in the process of migrating a Windows NT 4.0 network, running Exchange 4.0 on the PDC, to Windows 2000 Server with a separate Exchange 2000 srver. Everything I can find says that the only way to do this is by first upgrading to Exchange 5.5, then upgrading to Exchange 2000. But I really don't want to buy both products if I don't have to. Is there a better way to do this? Any suggestions would be greatly appreciated.