Is this an internal company name server or an Internet name server? If it is an Internet server, it won't be configured to accept dynamic updates. You'll need to install your own DNS server. The machine you're promoting would do fine if you have a small shop but you'll be faced with maintaining two DNS zones, one internal and one external.
My recommendation would be to set up an internal zone with the name abc.local. Point your clients at that name server. Delete the root zone (the one with the dot) and point the W2K DNS server at the Internet DNS server as a forwarder. Hope this helps.
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