BuckyBadger

I think it was this one: https://support.microsoft.com/en-us/help/4088889 In particular: Addresses issue where customers can't change the lock screen image from the Settings app. This occurs if the "Force a specific default lock screen and logon image" Group Policy is turned on and the "Prevent changing lock screen and logon image" Group Policy is turned off.

We ran into a similar issue with our old 1607 machines and if I remember right, the problem was introduced by a patch. I want to say it was the March or April rollup. One of my co-workers came up with a workaround by tossing the image into the cache or something with SCCM. Thankfully, the problem isn't there in 1803.

Has anyone made any progress on this? I'm running into the same issue and I'm stuck at the same place as alfatec.