Are you creating an entirely new domain with identical usernames
Or are you upgrading a domain from mixed mode to native mode
If its different domains it will get messy, but nothing that cannot be sorted out with a trust and an eval copy of doubletake or replistore
Weve actually got 2 seperate domains (brilliantly with different naming conventions just to add to the fun...) but we need to move a fileserver from the old domain to the new one. Personally I dont see how were going to do it without the AD names matching up. Nightmare...