How to block 24H2 to be installed on Windows 11

Good day,

Maybe I can help you with this. A few weeks ago, I had a case with Microsoft regarding something similar to your question.

You can set a Feature Update deferral period, for example, 30 days, to postpone the update to 24H2 for 30 days after its release in the "Update Rings" policy.

If you want more control, it’s best to set this to 0 and configure an additional "Feature Updates" policy. With this policy, you can plan your 24H2 release. If you configure this policy, including the deferral in the "Update Rings" policy, it may cause a conflict. Therefore, you should set the deferral to 0 when using the Feature Updates policy.

More information: https://learn.microsoft.com/en-us/mem/intune/protect/windows-10-feature-updates#limitations-for-feature-updates-for-windows-10-and-later-policy