Active Directory upgrade from 2008 r2 to 2019

pozlu0 216 Reputation points
2021-08-11T09:59:26.237+00:00

Good morning,

I am going to perform an Active Directory upgrade from 2008 r2 to 2019 for a client.
The 2008r2 infrastructure has an exchange 2010 deployed on it.

I would like to know if there is some problem in performing the request without upgrading exchange.

Kind regards

Active Directory
Active Directory
A set of directory-based technologies included in Windows Server.
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  1. Dave Patrick 426.2K Reputation points MVP
    2021-08-11T12:58:04.237+00:00

    Exchange 2010 looks to not be supported.
    https://learn.microsoft.com/en-us/exchange/plan-and-deploy/supportability-matrix?view=exchserver-2019#supported-active-directory-environments

    As to AD upgrade; the two prerequisites to introducing the first 2019 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 2019, 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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  2. pozlu0 216 Reputation points
    2021-08-13T10:20:36.347+00:00

    Thank you so much DSPatrick for your valuable help