Inplace upgrade of a DC stuck at 25% from OS 2012 to 2019

Mujtaba Ali 1 Reputation point
2021-07-29T10:18:55.053+00:00

I am doing inplace upgrade of a DC which is server 2012 to server 2019 but it always stuck at 25% . How should i resolve ? I have done sfc scan and renamed software distribution folder also there is around 25 GB free space in C drive.
How can i resolve this ?
Before run the inplace upgrade schema update for forest and domain prep ran successfully as well.

Windows Server 2019
Windows Server 2019
A Microsoft server operating system that supports enterprise-level management updated to data storage.
3,510 questions
Windows Server 2012
Windows Server 2012
A Microsoft server operating system that supports enterprise-level management, data storage, applications, and communications.
1,544 questions
Active Directory
Active Directory
A set of directory-based technologies included in Windows Server.
5,997 questions
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3 answers

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  1. Dave Patrick 426.2K Reputation points MVP
    2021-07-29T11:27:56.113+00:00

    The much safer / simpler method is a migration.

    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. Hannah Xiong 6,236 Reputation points
    2021-07-30T02:08:27.907+00:00

    Hello @Mujtaba Ali ,

    Thank you so much for posting here.

    The recommended way to upgrade a domain is to promote domain controllers that run newer versions of Windows Server and demote the older domain controllers as needed. That method is preferable to upgrading the operating system of an existing domain controller.

    We could follow the provided instructions to do the migration.

    As for our issue, we could review the log file about the upgrade and check whether we could find out the cause.
    https://support.microsoft.com/en-us/topic/log-files-that-are-created-when-you-upgrade-to-a-new-version-of-windows-9ec8aa31-0cc1-a0b2-2d98-e9c6714349b9

    For any question, please feel free to post here.

    Best regards,
    Hannah Xiong

    ============================================

    If the Answer is helpful, please click "Accept Answer" and upvote it.

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  3. Dave Patrick 426.2K Reputation points MVP
    2021-07-31T04:57:04.97+00:00

    Just checking if there's any progress or updates?

    --please don't forget to upvote and Accept as answer if the reply is helpful--

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