I was performing a rename of an Active Directory domain that consists of two domain controllers running Windows Server 2012, and everything was going smoothly... However, I ran the rendom /clean utility too soon.
If you execute rendom /clean before all the machines in the domain get rebooted twice, they won't be able to access the domain any longer... /clean removes the alias/migration information from Active Directory.
Unfortunately, I ran /clean without realizing the catastrophic effect it would have -- making all the machines that haven't rebooted, no longer be able to access the domain.
Is there a way to undo the /clean? I took bare-metal backups of the DC's before doing the rename operation, so I'm looking at restoring those now -- but I would like to know if there's a way to just add the alias information back into Active Directory.