InPlaceUpgrade 2012R2 - 2022

Andreas 1,301 Reputation points
2021-10-06T21:10:46.06+00:00

Hi,

Is it possible to do a inplaceupgrade directly from windows Server 2012R2 Datacenter to Windows Server 2022 Datacenter ?
I have seen someone say yes, and someone say no.

Also this link is not updated: https://learn.microsoft.com/en-us/windows-server/upgrade/upgrade-overview

On other question, do MS recommend clean install or upgrade when it comes to domain controllers ?

Thanks for reply.

/R Andy

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Accepted answer
  1. Anonymous
    2021-10-06T21:55:54.157+00:00

    do MS recommend clean install or upgrade when it comes to domain controllers ?

    Always clean install it. This is the simplest solution.

    The two prerequisites to introducing the first 2022 domain controller are that domain functional level needs to be 2008 or higher and older sysvol FRS replication needs to have been migrated to DFSR
    https://techcommunity.microsoft.com/t5/Storage-at-Microsoft/Streamlined-Migration-of-FRS-to-DFSR-SYSVOL/ba-p/425405

    I'd use dcdiag / repadmin tools to verify health correcting all errors found before starting any operations. Then stand up the new 2022, 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 upvote and Accept as answer if the reply is helpful--

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  1. Limitless Technology 39,496 Reputation points
    2021-10-07T10:31:56.16+00:00

    Hello Andreas,

    In-place upgrade is not recommended by Microsoft in any server. Fresh install and migration of services between versions is the way to go, specially when it comes to Domain Controllers.

    Yes, there are few examples from people who made an In-Plance upgrade from a clean Windows 2012R2 to Windows 2022, but just because it was possible it doesn't mean that the system will surely work as expected or not have unexpected issues later.

    The fact that Microsoft hasn't updated yet the migration path articles, is an example that they can't fully ensure the process at this moment.


    --If the reply is helpful, please Upvote and Accept as answer--

    1 person found this answer helpful.

  2. Andreas 1,301 Reputation points
    2021-10-07T07:35:07.74+00:00

    Hi,

    Thanks for reply @Anonymous

    I will then do a clean install of the domain controllers, and good to know the thing around DFSR, did not know it was last "supported" under 2016. I dont have the environment in front of me now, but I will check later if they have DFSR. On thing, do you know if Windows Server 2012 R2 comes default with DFSR if you configured DC`s ?

    Agree with the clean install thing, but the customer do have some application servers that we hope we could do a inplaceupgrade, thats why I was wondering if it was a supported way to upgrade, do you know, or do you have any official links to ms telling me no/yes.

    /R
    Andy