http://blogs.technet.com/kdubois/archive/2005/03/10/392415.aspxAs we begin to wrap up our discussion on NT 4.0, keep in mind that in a nutshell, Domain upgrade is a process designed to maintain as much of your current environment as possible, including your domain structure. Domain restructure , on the other hand,en-USCommunityServer 2.1 SP1 (Build: 61025.2)