I have a Windows 2003 file server that is a member of our 2008r2 Active Directory domain. Many users scan to a folder on the C drive of this server and each user has their own sub folder under the scan folder. Today all subfolders that start with a letter past M in the alphabet vanished!!! I first went to see if I had them backed up, but in searching for an individual users folder I found them, even though they were not visible. I copied the folders to a different location on the C drive and they are now visible with all data inside. How could this have happened? Any clues on how I can troubleshoot this?