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Help upgrading domain controller 2012r2 to server 2016 RRS feed

  • Question

  • I am going to upgrade my domain controller that is running 2012r2 to 2016. Is it correct that any 3rd party applications will not be upgraded? I will have to reinstall them. Any advice will help.

    Thank you.

    Thursday, July 2, 2020 9:14 PM

Answers

  • Hi,

    A Domain Controller should only have the Domain Services roles installed, nothing else.

    But yes, no third party application will be upgraded if you perform an upgrade of the Windows Server operating system.

    Also the an in-place upgrade is risky, the recommended approach is to clean install, however if you still want to perform the in-place upgrade you can follow along here:

    Upgrade Domain Controllers to Windows Server 2016
    https://docs.microsoft.com/en-us/windows-server/identity/ad-ds/deploy/upgrade-domain-controllers

    Best regards,
    Leon


    Blog: https://thesystemcenterblog.com LinkedIn:

    • Marked as answer by Acenyc59 Thursday, July 2, 2020 10:11 PM
    Thursday, July 2, 2020 9:53 PM
  • Hi,

    I am glad to hear that your issue was successfully resolved.

    If there is anything else we can do for you, please feel free to post in the forum.

    Have a nice day!

    Vicky


    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    • Marked as answer by Acenyc59 Friday, July 3, 2020 12:49 PM
    Friday, July 3, 2020 8:08 AM
  • For every upgrade you need a rollback plan, backups are important. However if you do have other Domain Controllers, then if something goes wrong with your upgrade, you might be better off installing from scratch rather than restoring (because this will already be too old data).

    Blog: https://thesystemcenterblog.com LinkedIn:

    • Marked as answer by Acenyc59 Friday, July 3, 2020 12:53 PM
    Friday, July 3, 2020 12:51 PM
  • You have everything you need in the official documentation in my initial reply:
    Upgrade Domain Controllers to Windows Server 2016

    There are plenty of step-by-step guides & videos out there, but the official documentation is always the best to follow.

    Here's also a guide:

    Migrate Domain Controller from Windows Server 2012 & R2 to Windows Server Server 2016
    https://social.technet.microsoft.com/wiki/contents/articles/37887.migrate-domain-controller-from-windows-server-2012-r2-to-windows-server-server-2016.aspx


    Blog: https://thesystemcenterblog.com LinkedIn:

    • Marked as answer by Acenyc59 Friday, July 3, 2020 2:20 PM
    Friday, July 3, 2020 1:15 PM
  • The much cleaner / safer method is to simply build a new one.

    The prerequisite before introducing the first 2016 domain controller: domain functional level needs to be 2003 or higher

    I'd use dcdiag / repadmin tools to verify health correcting all errors found before starting. Then stand up the new 2016, patch it fully, license it, join existing domain, add active directory domain services, promote it also making it a GC (recommended), transfer FSMO roles over (optional), transfer pdc emulator role (optional), use dcdiag / repadmin tools to again verify health, when all is good you can decommission / demote old one.

     

    (please don't forget to mark helpful replies as answer)

     

     

     

     



    Regards, Dave Patrick ....
    Microsoft Certified Professional
    Microsoft MVP [Windows Server] Datacenter Management

    Disclaimer: This posting is provided "AS IS" with no warranties or guarantees, and confers no rights.

    • Marked as answer by Acenyc59 Friday, July 3, 2020 2:20 PM
    Friday, July 3, 2020 1:17 PM

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