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We’ve recently identified an issue in the security baseline policy update flow where customizations made, which differ from the security baseline recommended value, aren’t retained during the update process. This issue affects customers who are updating their baseline version to a more recent version. For example, updating the security baseline from version 23H2 to version 24H2.

Temporary workaround
While we work on the fix, we recommend that admins manually reapply their customizations after updating their baseline policies.

Review Update a profile to the latest version in the Microsoft Learn documentation for information on the baseline update process.

We’re working on a fix to address this issue and will update this blog when we have more information. If you have any questions, leave a comment on this post or reach out to us on X @IntuneSuppTeam.