I've setup client desktop background via GPO Administrative Template, in user configuration. It works fine but sometimes users randomly reports they get a black wallpaper instead of the designated one. I checked the Event Viewer but couldn't find any error about that policy.
99% of the users have laptops and travel, so they not always have the domain server available for fetching the image. So I thought I'd change the policy to copy the background locally on the computer and set it from the C: drive, but the black wallpaper was happening anyway! This is still a non-issue as it happen even when users are in LAN. And I occasionally checked, the domain was correctly reachable via its DNS name.
I know it's hard to debug such a issue without a log, but I was wondering if there's a mistake or something which could lead to this result.
The only problem in the network is that some DCs has been taken offline without being correctly removed from the AD, they're still linked. But all DHCPs has been set up to use the remaining DC as primary DNS (and Google as fallback). Could this have some influence on GPO implementation?
Thanks
[...]some DCs has been taken offline without being correctly removed from the AD[...] all DHCPs has been set up to use [...] (and Google as fallback)
=> That's two issues, you should fix that before trying anything else\\domain
share wasn't accessible at logon. It could be a share configuration or permission problem.