Can't Remove DC from Active Directory

There was an old 2008 DC that was mainly used for DR purposes which died some time ago. It had no FSMO roles. I wanted to try removing it from my AD but, when I try and delete its entry in Users and Computers, I am getting an "access denied" error. I checked and the "Protect object from accidental deletion" checkbox is unchecked for that DC in Sites and Services so now I don't know what to do. Any ideas?
medium_gradeAsked:
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MaheshArchitectCommented:
ensure that account used for deletion is member of domain admins
Also if you could force ad replication, and check if DC object is already deleted and may be deletion is not replicated
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medium_gradeAuthor Commented:
I'm using the administrator account.

I'll try and force replication, but I don't understand why I would already be deleted. This is the first time I've attempted this.
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medium_gradeAuthor Commented:
Now that I think about it, there are no other DCs in this environment. Wouldn't they force replication be meaningless at that point?
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MaheshArchitectCommented:
how many total DCs you have?

are you saying that this is only DC or what?

Can you logon to PDC master server and check if you are able to locate the problematic DC?
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medium_gradeAuthor Commented:
There is only one active DC. This is for a fairly small office. The problematic DC was a VM at another site for disaster recovery purposes only. It's been down for at least 4-5 months now.
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Lee W, MVPTechnology and Business Process AdvisorCommented:
If you didn't properly remove it from Active Directory, you'll have to follow the procedure for deleting failed DCs.

I don't bother memorizing the procedure, I just reference it online, usually from Dan Petri's web site:
https://www.petri.com/delete_failed_dcs_from_ad
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MAS (MVE)EE Solution Guide - Technical Dept HeadCommented:
Agree with Lee W.
You should cleanup the failed/offline ADC. That too your ADC is offline since 4-5 months.
Please be careful while cleaning up. A backup of system state is recommended.

To be safe Install another ADC as you have only one DC. ADC will protect/save you at the time of DC failure incase.

Thanks
MAS
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Windows Server 2008

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