Backup Exec supports the non-deduplicated restore of volumes that have Windows deduplication enabled. When you restore files from a volume that has Windows deduplication enabled, Backup Exec places the files on the disk as non-deduplicated.
Ensure that you have enough disk space to restore the non-deduplicated data before you run a restore job. You should free space on the volume on which you want to restore the files. Run the Windows garbage collector to optimize the space on the volume before you run the restore job.