This is a DNS question, I promise. Just let me explain my situation. I have a small network of about 35 â€“ 40 computers. I have begun the migration from NT 4.0 Server to Win 2000 AD. The point I have reached is that I have upgraded the old NT 4.0 Server to Win 2000 AD (Server A) and now Iâ€™m trying to add a new server (Server B) as another DC. When I try and add the new server (Server B), it comes up with an error stating that the domain cannot be found and may be caused by DNS lookup issues. I have a forward lookup zone on the upgraded Server (Server A) and have created a reverse lookup zone (1.168.192.in-addr.arpa) which has not resolved my issue of not being able to add (Server B). So, what am I doing wrong?