For version 5.1 or later, the backed up NTFS permission will be restored automatically. For other versions, assuming the NTFS Permission is being stored in "C:\NTFS-Permission.txt", please do the followings:

Restore "C:\NTFS-Permission.txt" from the backup server using OBM

Apply all NTFS permissions backup to all your backup files by running:

"C:\Program Files\Windows Resource Kits\Tools\subinacl" /playfile C:\NTFS-Permission.txt