Demote all of the DCs in that domain. When you demote the last DC in the
child domain you should check the option that "this is the last domain
controller for this domain". If there are remnants of the domain after you
have demoted the domain controllers then you can run a metadata cleanup to
remove it. See the following articles for more info
816108 HOW TO: Use the Dcpromo.exe Tool to Remove Active Directory in
Windows
http://support.microsoft.com/?id=816108
238369 HOW TO: Promote and Demote Domain Controllers in Windows 2000
http://support.microsoft.com/?id=238369
230306 HOW TO: Remove Orphaned Domains from Active Directory
http://support.microsoft.com/?id=230306
--
Tim Hines, MCSE, MCSA
Windows 2000 Directory Services
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