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I have a Windows Server 2012 R2 Standard box that I was trying to set as a second domain controller, but ran into some problem and now it's stuck in promotion limbo.

I cannot promote it because I get the following error:

Error determining whether the target server is already a domain controller: The domain controller promotion completed, but the server is not advertising as a domain controller.

I am also unable to remove the AD DS role because DC needs to be demoted, which I also cannot do. When trying to demote it, I get the following error:

The operation failed because:

DFS Replication: The target principal name is incorrect.

"The target principal name is incorrect."

 /netdom query fsmo

sometimes shows the correct information and other times returns

The target principal name is incorrect.

The command failed to complete successfully.

I'm not a Windows Server expert, so this has me stumped. Any advice would be greatly appreciate.

Thanks in advance.

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