In place upgrade of 2 Windows Server 2012 R2 Standard Domain Controllers to Server 2016 RRS feed

  • Question

  • Good day,

    I have two Server 2012 R2 Standard domain controllers that I'm looking to do an in place upgrade to Server 2016.

    I've done some searching and did find this video that talks about doing an in-place upgrade:


    The AD Prep  (domain and forest) looks straight forward.

    My plan is to upgrade one domain controller and then run it and test it and get the feel for it and then soon after do an in-place upgrade of the second domain controller.

    Right now the domain is at the 2008 functional level.

    The steps in the video look relatively straight forward, but then sometimes things are more complicated than in videos.

    I'm looking for tips and especially looking to hear from anyone who has experience, whether or not it was straight forward or if they had issues.

    I can say that one of the DC's is a Hyper-V VM and the other is a physical server.

    Thursday, October 18, 2018 3:13 PM

All replies

  • I should also add that they host DNS and DHCP, but nothing otherwise.
    Thursday, October 18, 2018 4:09 PM
  • An in-place upgrade may be possible but is a risky move. A better option is to clean install it. I'd use dcdiag / repadmin tools to verify health correcting all errors found before starting. Then I'd stand up a 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 verify health, when all is good you can decommission / demote old one and move on to next one.



    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.

    Thursday, October 18, 2018 4:23 PM
  • Hi,

    Agree with Dave, if you still want perform a in-place upgrade, please note that we also need to run adprep /forestprep and adprep /domainprep manually.

    For your reference:


    Best Regards,


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    Friday, October 19, 2018 2:47 AM