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. <a href=”http://technet.microsoft.com/en-us/library/cc736378(WS.10).aspx”>Clean the metadata</a> afterwards to make sure all remaining data is removed.