The answer you seek is not that apparent. Your accounts will have to be migrated to W2K because of the ASD. (Look to Novell 4.5...that is where Microsoft got/bought this technological innovation from!) Although you do not have to worry about your TRUST relationships...as soon as you enacted an AD you told your network that the new Sheriff in town was W2K. Your NT domain will still exist, but all changes that you want to impose on your network (including policies, user rights, etc.) will have to be declared by the FOREST/TREE!