Hello @Mike Ehrmantraut ,
Please share few more observations,
- Are you able to see the desired wallpaper on same system if you login with different user?
- Are you able to see the desired wallpaper if you login the problematic user o different system?
- Have you verified if the problematic user also have some other policies which are overriding the desktop policy.
- Are you also experiencing any other issues for this user?
Regards,
Amol