I set a desktop wallpaper GPO and it appeared to be working correctly. I then overwrote the JPG that's stored on the server with another JPG with the same name but it wouldn't change on the client. I ran a gpupdate /force and still to no avail. It wasn't until I add the new JPG under a different name that it updated, but only after a restart of the client.
Is there a way to have the clients update even if the file names were the same? Why didn't it change the JPG when overwriting the file?