Demote a domain controller

George Ntavelis 66 Reputation points
2021-08-02T20:28:11.56+00:00

Hello!

We have 4 domain controllers in total (2 production site / 2 disaster recovery site). One of the two that they are located to DR stopped out of the blue to install the windows updates. I tried almost everything that i could found over the internet and nothing help me to solve it. So i took the decision to create a new virtual machine with the role of a domain controller and demote the one that is broken.

My question is this... If i will demote the dc can i reuse its name and ip for the new virtual machine or i will have issues with the AD or AD site and services? Could you please let me know?

Thank you in advance

Active Directory
Active Directory
A set of directory-based technologies included in Windows Server.
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  1. Fan Fan 15,301 Reputation points Microsoft Vendor
    2021-08-02T23:34:38.92+00:00

    Hi,

    Yes, we can reuse the name and IP address for the new DC.
    This method is used in many situations

    Let's name the old DC: DC1,
    To rename DC to preserve OLD Name and IP address, following steps for your reference:

    Removing AD and Domain Services Role from DC1
    Rename to DC1-OLD
    IP change
    Turn Off

    Rename New DC to DC1
    Assign the old IP to this new DC1.
    Install the Domain Services role and promote it to DC.

    Best Regards,

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  1. George Ntavelis 66 Reputation points
    2021-08-03T07:44:35.05+00:00

    Thank you FanFan :) I will try this today and i will let you know! Do i have to do something with the metadata of the dc that i will demote?

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