File Protection does not support backing up reparse points, such as mount points, junction points, and symbolic links. A reparse point is a special type of file which causes some sort of redirection in the file system. A junction point is a specific type of reparse point. The other types are mount points and symbolic links. A junction point can be created on an empty directory and points to another directory somewhere on the file system (known as the target of the junction point) so that when a user accesses the junction point, they are redirected to target.
For example, on Windows 7 and later, "C:\Documents and Settings\" is a reparse point with target "C:\Users\". This means that older programs that have a hardcoded path to "C:\Documents and Settings\" will be redirected to use its modern equivalent "C:\Users\". A mount point is like a junction point, but points to a whole volume instead of a directory. A symbolic link is also similar to a junction point, but can point to files as well as directories. Symbolic links are a new feature in 7 and later versions of Windows.
To learn more about reparse points, see MSDN Reparse points.
Select Warn about skipped reparse points to be notified in the backup report that reparse points could not be backed up.