upgrade additional 2008 ad server

Daisy Zhou 20,791 Reputation points Microsoft Vendor
2020-07-15T04:54:38.65+00:00

Hi
In our environment we have 2012 r2 DC Server with all the roles in it
We also have 2008 r2 server that function as secondary DC , we would like to upgrade it to Server 2012 R2
Is there anything I should do except upgrading OS ?

Source link:
https://social.technet.microsoft.com/Forums/windowsserver/en-US/8587f498-e56d-4b40-a7ce-53d29f23d6e1/upgrade-additional-2008-ad-server?forum=winserverDS

Active Directory
Active Directory
A set of directory-based technologies included in Windows Server.
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  1. Fan Fan 15,321 Reputation points Microsoft Vendor
    2020-07-15T04:58:54.163+00:00

    Hello,

    Thank you for posting in our TechNet forum.

    According to your description, we want to upgrade the Windows Server 2008 R2 to Windows Server 2012 R2.

    It is recommended that we do not do in-place upgrade. We recommend we add a new 2012 R2 DC to the existing domain instead of upgrading the Windows Server 2008 R2 to Windows Server 2012 R2.

    Here are the steps about how to add a new DC to existing domain. We can try the above steps.

    1, Check DC health by running Dcdiag /v and check AD replication by running repadmin/showrepl and repadmin /replsum.
    2, Join Windows Server 2012 R2 to existing domain.
    3, Promote Windows Server 2012 R2 as Domain Controller.
    4, Repeat step1 to check AD environment health.
    5, Transfer FSMO roles to the new DC if needed.
    6, Demote the old DC if needed.
    7, Raise domain / forest function level based on our requirement and environment.

    For any question, please feel free to contact us.

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