Hi @Peter Volz ,
You can check the SKUPolicyRequired in
HKLM\System\CurrentControlSet\Control\CI\Policy , the value
1 indicates the Windows 10 device is operating in S mode.
If the answer is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.