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Domain Controller Woes

Over the course of my work at my current place of employment, I have run into all sorts of issues either promoting new Active Directory domain controllers or demoting them.

Most recently, in a project to remove Windows Server 2003 boxes from an environment, I have four domain controllers running: two Windows Server 2003 and two Windows Server 2008 R2.

Issues Demoting Windows Server 2003 DCs

The RPC server is unavailable.

After transferring all of the FSMO roles off to a 2k8r2 server, I prepared to demote the first of the domain controllers. What happened?

The operation failed because:

Active Directory could not transfer the remaining data in directory partition
CN=Schema,CN=Configuration,DC=xxx,DC=NET to domain controller yyy.xxxx.NET.

"The RPC server is unavailable."

Retrying failed again, even though the RPC service was running on the referred to DC. Damn.

Well, the fix isn’t as hard as I thought, even though I had to piece the solution together from a number of sources.

  1. Change the to-be-demoted DC’s DNS servers to your new DCs.
  2. Run ipconfig /flushdns
  3. Run dcpromo again.

That’s it. It works. Horray.

I’ll expand this post as I discover more solutions.

Published inSoftware