Decommissioning 2012 DC

Jeff Mock 1 Reputation point
2021-09-17T13:29:25.4+00:00

I need to decommission a 2012 R2 domain controller. We have 7 sites and this is the domain controller for site 1. Nothing is using the domain controller. All computers are using other DNS servers/DHCP servers at this time. My question is, do I need to do anything in AD Sites and services so that a different domain controller services this site? I can't seem to find anywhere to assign a different domain controller to the subnet in Sites and Services. Does this even need to be done or can I decommission the DC and be done? Thanks in advance.

Windows Server
Windows Server
A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.
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Active Directory
Active Directory
A set of directory-based technologies included in Windows Server.
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  1. Dave Patrick 426K Reputation points MVP
    2021-09-17T13:32:15.387+00:00

    When you demote this one the KCC will automatically assign another domain controller at site to become the bridgehead server so nothing else should need to be done.

    --please don't forget to upvote and Accept as answer if the reply is helpful--

  2. Limitless Technology 39,336 Reputation points
    2021-09-17T17:11:23.627+00:00

    Hello @Jeff Mock

    In my experience you do not have to do anything after demoting this domain controller from dcpromo wizard.

    But , you can verify after decommissioned of DC.

    1. From AD sites and services this DC references are removed.2
    2. From DNS console, all DNS records and SRV records get removed.
    3. Please check AD Replication is good in health state after removal .

    Hope this helps.

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