One of our users has reported that their mapped drives were missing. Our user's mapped drives are all being pushed out by group policy so at first this was not an unusual report.

Upon investigation I seen the drives were in fact missing so I did a gpupdate to refresh the group policies which normally fixes the problem. This time it didn't, my backup plan is normally to manually map the drives needed until we figure why the group policy is not working.

Here is where things get weird:

When I go to map the drives, they are all already mapped. Then I find out from the user that they are all showing up correctly through their applications such as MS Office and Adobe Acrobat Pro. They can also access all of their files normally through each app. But they are not showing up in file explorer when we go to 'this PC'. A reboot normally fixes the problem though the user is starting to get a little annoyed of having to reboot each time.

Anyone have any ideas of what could be causing this?