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Upgrade DCs from 2008 r2 to 2012

Michigan39 31 Reputation points
2021-11-24T16:16:26.667+00:00

Do I introduce new 2012 servers into AD as DCs or is it best to just upgrade the current 2008 R2 domain controllers to 2012?

Windows Server
Windows Server
A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.
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Active Directory
Active Directory
A set of directory-based technologies included in Windows Server.
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Windows Server Migration
Windows Server Migration
Windows Server: A family of Microsoft server operating systems that support enterprise-level management, data storage, applications, and communications.Migration: The process of making existing applications and data work on a different computer or operating system.
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  1. Dave Patrick 426.3K Reputation points MVP
    2021-11-24T16:27:52.057+00:00

    Never do an in-place upgrade.

    I'd use dcdiag / repadmin tools to verify health correcting all errors found before starting any operations. Then stand up the new 2012, 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--

  2. Thameur-BOURBITA 32,606 Reputation points
    2021-11-25T21:21:19.283+00:00

    Hi,

    Upgrade in place it's possible but it's recommended.

    It's recommended to migrate your domain controller to latest version , Windows 2016 or Windows 2019.

    Please don't forget to mark helpful reply as answer

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