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Azure DevOps Server 25H2 migration

Patric Forsgard 0 Reputation points
2026-04-22T18:05:55.4666667+00:00

We have an an on-prem version of Azure DevOps Server 25H2 (released 9th of December 2025 regarding to release notes) that we want to migrate into Azure DevOps but the migration tool says

The Azure DevOps Services migration tool currently supports Azure DevOps Server up to 2022.x 25H2 is newer than the latest supported import version

Regarding to the documentation for the DevOps Migration tool it's support the latest 2 versions of DevOps for upgrade.

When will there be a version of the migration tool supporting the latest version of Azure DevOps Server?

I have read in the Visual Studio Community that recommendation is to restore an old backup from prior the upgrade to 25H2 version and using that for doing the migration, but that is not an option due to data loss that will happen for the last few month of usage. It's not either possible to restore backup and using the old version of DevOps Application tier, but that should not either be an option due to that DevOps server isn't down gradable between versions.

Azure DevOps

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  1. Rakesh Mishra 9,425 Reputation points Microsoft External Staff Moderator
    2026-04-22T19:10:10.7633333+00:00

    Hello Patric,

    You are encountering the “newer than the latest supported import version” message because the Azure DevOps Data Migration Tool does not yet support Azure DevOps Server 25H2. The tool strictly validates against supported server builds, and unfortunately, Azure DevOps Server databases cannot be downgraded once upgraded. Restoring a pre-25H2 backup is the only way to revert, but as you noted, doing so would result in the loss of any work done since the upgrade.

    Regarding the timeline, the standard 2–3 week post-release window for migration support did not apply to the 25H2 release. According to the latest official update from the Microsoft Product Group (published in mid-April 2026), support for Azure DevOps Server 25H2 in the migration tooling is currently tracking for release in approximately 6 weeks (roughly late May or early June 2026). Please note that this is a working target based on ongoing validation.

    What you can do in the meantime:

    • Wait for the updated tool: Since downgrading isn't possible without data loss, the safest path is to wait for the Data Migration Tool update to officially support 25H2.
    • Monitor official channels: Keep an eye on the Azure DevOps Server Release Notes and the Azure DevOps Blog for the announcement of the updated tool.
    • Verify your current build: Ensure your server is fully patched with the latest 25H2 hotfixes to maintain environment stability while you wait.

    Hope this helps and do let me know if you have further questions.

    References:

    Note: This response is generated with the help of AI systems.

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