Hello Bischof
It sounds like you have configured your Group Policy settings correctly, but there may be an issue with the way Windows 11 is handling the automatic reboot after updates are installed. Here are a few things you can try to troubleshoot and potentially resolve the issue:
1. Check for conflicting Group Policies: Make sure there are no conflicting Group Policies that may be overriding the setting to automatically restart after updates are installed. You can run a Group Policy Results report on one of the affected Windows 11 computers to see if any other policies are applying that could be causing this issue.
2. Check for Windows Update settings: Verify the Windows Update settings on the affected Windows 11 computers to ensure that there are no conflicting configurations that may prevent the automatic restart after updates. Double-check the "Active Hours" settings to make sure they are not conflicting with the scheduled restart time.
3. Check for pending restart notifications: Sometimes, Windows may display a notification that a restart is pending but does not automatically reboot. Users may need to manually initiate the restart after updates are installed. Make sure to check for any pending notifications on the affected computers.
4. Use Windows Update troubleshooter: Run the built-in Windows Update troubleshooter on the affected Windows 11 computers to see if it can identify and fix any issues related to update installation and automatic restart.
5. Check Event Viewer logs: Review the Event Viewer logs on the affected Windows 11 computers to see if there are any errors or warnings related to Windows Update or automatic restarts. This may provide more insights into what could be causing the issue.