Does Veeam Endpoint Backup support SIS volumes
I assume that you might have issues backing up ‘file pointers’. VEB does not backup source files for symlinks or junction points of any kind. Thus, I believe you can backup the volume, however it won’t contain files/folders that are presented as a ‘link’.
backing up open files (using VSS)
backup up shared folders where administrator has no access permission
VEB does not backup shared folders, only folders that reside the local volume
preserve NTFS Permission when restoring from file-level backup
why does Veeam Endpoint Backup need SQL to work?
A good explanation is in this post.