To be sure, we have not received any error messages, though OneDrive will not allow the back up of the Desktop folder, for one user only. We know that only the Desktop and Documents folders should back up because of a GPO, but there are no other GPs affecting the user folders. We have tried putting the user's computer in the Computers OU temporarily, just to get some action, which didn't work in this case. When we put it back into it's regular OU, the problem still exists.