[ActiveDir] NT upgrade

[Brian Pietrewicz]

Hello everyone,   I would like to test a domain that has been upgraded from NT to 2000.  If I upgrade an NT domain (domain1) to a 2000 domain and name it domain2, will the NT domain remain functional?  In the end I would like to upgrade an NT domain to a 2000 domain and have both online and functional.   I plan to do this by taking an NT BDC offline, promote it to a PDC, upgrade it to 2000, then name it domain2, and bring it back online.  Will this work?   Can anyone see any potential problems?   Thanks,   Brian