Hello MHHUANG,
Thank you for posting in Microsoft Community forum.
1000570 19.1.3.1 Ensure 'Enable Screen saver' is set to 'Enabled'
A: Where did you configure it?
Even tho we have configure GPO to be push down to the servers, GMSA account are being flagged out as not configured.
A: What specific GPO setting did you configure and set the GMSA?
If you have any question or concern, please feel free to let us know.
Best Regards,
Daisy Zhou