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

Question

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.

Answer 1

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.

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Answer 2

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

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Answer 3

Just checking if there's any progress or updates?

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