I have a SBS 2011 and users are working with a redirected documents folder. Several users reported that existing files e.g. docx) suddenly have 0 byte. One user reported that after moving a file, it had 0 bytes at the target folder. It was deleted in the the source folder, of course.
I have NO IDEA why that happens and don't even know where to begin troubleshooting.
Have you ever had that case?