http://msmvps.com/blogs/lduncan/archive/2005/10/06/69375.aspxActive Directory Migration Toolkit (ADMT) is the strategic offering from Microsoft that assists you in solving technical and business problems pertaining to restructuring of your Active Directory environments, as well as transitioning from NT4.0 to ActiveenCommunityServer 2008.5 SP2 (Build: 40407.4157)