We have one NT4 BDC in our windows 2000 domain. We would like to remove it from Domain Comtrollers. When I tried to delete NT BDC from Domain Controllers of AD users & computers I received "The DSA object cannot be deleted" message. I thought that might be the DNS issue because the NT didn't list in the DNS records and we could ping host name only but not FQDN. So I added the record in the DNS and I can ping FQDN now, but still get the same error. Any suggestions? Do I need to use dcpromo command? If yes, in which server?