At the command prompt, type ntdsutil.
Type 'metadata cleanup', and then press ENTER. Based on the options given, the administrator can perform the removal, but additional configuration parameters need to be specified before the removal can occur.
Type 'connections' and press ENTER. This menu is used to connect to the specific server on which the changes occur. If the currently logged on user does not have administrative permissions, alternate credentials can be supplied by specifying the credentials to use before making the connection. To do so, type 'set creds domain nameusernamepassword' and press ENTER. For a null password, type null for the password parameter.
Type 'connect to server servername', and then press ENTER. You should receive confirmation that the connection is successfully established. If an error occurs, verify that the domain controller being used in the connection is available and the credentials you supplied have administrative permissions on the server.
Type 'quit' and press ENTER. The Metadata Cleanup menu is displayed.
Type 'select operation target' and press ENTER.
Type 'list domains' and press ENTER. A list of domains in the forest is displayed, each with an associated number.
Type 'select domain number' and press ENTER, where number is the number associated with the domain to which the server you are removing is a member. The domain you select is used to determine if the server being removed is the last domain controller of that domain.
Type 'list sites' and press ENTER. A list of sites, each with an associated number, is displayed.
Type 'select site number' and press ENTER, where number is the number associated with the site to which the server you are removing is a member. You should receive a confirmation listing the site and domain you chose.
Type 'list servers' in site and press ENTER. A list of servers in the site, each with an associated number, is displayed.
Type 'select server number', where number is the number associated with the server you want to remove. You receive a confirmation listing the selected server, its Domain Name Server (DNS) host name, and the location of the server's computer account you want to remove.
Type 'quit' and press ENTER. The Metadata Cleanup menu is displayed.
Type 'remove selected server' and press ENTER. You should receive confirmation that the removal completed successfully. If you receive the following error message:
Error 8419 (0x20E3)
The DSA object could not be found
the NTDS Settings object may already be removed from the Active Directory as the result of another administrator removing the NTDS Settings object, or replication of the successful removal of the object after running the DCPROMO utility.
Type 'quit' at each menu to quit the NTDSUTIL utility. You should receive confirmation that the connection disconnected successfully.
Remove the cname record in the _msdcs.root domain of forest zone in DNS. Assuming that DC is going to be reinstalled and re-promoted, a new NTDS settings object is created with a new globally unique identifier (GUID) and a matching cname record in DNS. You do not want the DC's that exist to use the old cname record. As best practice you should delete the hostname and other DNS records. If the lease time that remains on Dynamic Host Configuration Protocol (DHCP) address assigned to offline server is exceeded then another client can obtain the IP address of the problem DC.
Good luck
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I have not failed, I've just found 10,000 ways that don't work
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Peter Van Eeckhoutte
peter.ve@pandora.be
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