Hello,
Based on this setup guide , it appears several steps were overlooked. Additionally, your current steps only apply where the Group Policy is set up, not the entire domain.
First, ensure the Authenticated Users group has read permissions on the C:\Windows\System32 folder. Typically, it’s better to use a shared network folder, like the SYSVOL directory on a Domain Controller, that all users can read from to store the screensaver file. This way, the folder will be synced to the clients' public user profile using Group Policy Preferences (GPP).
Meanwhile, you need to export the relevant registry value from a reference computer and then import it into the Group Policy.
Finally, enable the "Force specific screen saver" policy and specify "PhotoScreensaver.scr" as the screensaver.
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