This has happened to several users over the course of a couple of months. They will all of a sudden lose the mapped path to their 'My Documents' on the server and will be remapped to the local machine. The mapping is done by AD automatically but there have been no changes to the AD for a long time. After it loses its mapped path, it wont allow me to remap the folder back to its original path. In fact, the field isn't editable at all.
What is causing this issue and how can I set it back to the old mapped path?