Windows 11 Pro does not support configuring the lock screen background by GPO.
For lock screen background, the documented edition support is:
- Windows 11 Pro / Pro Education: Intune/CSP supported, GPO not supported
- Windows 11 Enterprise / Education: Intune/CSP supported, GPO supported
- Windows 11 IoT Enterprise: Intune/CSP supported, GPO supported
That matches the observed behavior: the GPO works on Windows 11 Enterprise and fails on Windows 11 Pro.
If the target devices are Windows 11 Pro, use one of these supported methods instead:
- In Microsoft Intune, create a Settings catalog policy.
- Use Personalization > Lock Screen Image Url.
- Set the value to an http or https URL pointing to a jpg, jpeg, or png image.
- Assign the policy to the required users or devices.
Or use a custom CSP policy with:
- OMA-URI:
./Vendor/MSFT/Personalization/LockScreenImageUrl - Data type:
string - Value: an
httporhttpsURL to ajpg,jpeg, orpngimage file
If the devices are Windows 11 Enterprise or Education, the GPO setting for lock screen is:
- Computer Configuration\Administrative Templates\Control Panel\Personalization
- Force a specific default lock screen and logon image
- Value: fully qualified local path or UNC path to the image file
For comparison, desktop background GPO is supported on Windows 11 Pro, but lock screen background GPO is not.
References: