Demote child domain Windows Server 2003

351965 pts.
Tags:
Active Directory Forest
Child Domain
Domain Controller
Microsoft Windows Server 2003
Windows Server 2003 Domain Controller
I have a single Windows Server 2003 SP2 AD forest with two DCs. Along with that, we have four remote sites. Each of these remote sites has a local DC (W2K3 SP2) configure as a child domain. One of the remote site  was shut down. We are now asked to remove the child DC from Parent AD.  We have plugged the child DC into our parent network and assigned it a local IP (different from the remote IP subnet). We are now getting the Event ID 2042 which states that NTDS Replication can not be performed due to the 60 days tombstone. What is the best way to demote this child domain without causing any problems?

Software/Hardware used:
Windows Server 2003, Windows Server 2003 Domain Controller

Answer Wiki

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Fix Event ID 2042 by using the Server 2003 support tool repadmin.exe.

The support tools command is:

repadmin /removelingeringobjects <DestDC> <SourceDCGUID> <NC> /Advisory_Mode

DestDC – DC that has the issues
SourceDCGUID – Source DC GUID used to compare with the DestDC
NC – The distinguished name of the directory partition

/Advisory_Mode option should be used first so you can see what changes will actually be made.

You can then demote the domain controller as you normally would. Clean the metadata afterwards to make sure all remaining data is removed.

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