You can redirect a restore job to a native Virtual Hard Disk (VHD) by selecting a supported computer as the restore job’s destination. Supported computers include computers running Microsoft Windows 2008 R2, or Windows 7 clients with RAWS installed. When you redirect a restore job to a native VHD, Backup Exec creates a VHD file that expands dynamically as you save data to it. The file can expand until it reaches 2040 GB, which is the maximum size for a native VHD file. You can create one VHD file that merges the data from all redirected backup sets. Or you can create a VHD file for each backup set.
See File Redirection restore options .
See About managing Microsoft Virtual Hard Disk (VHD) files in Backup Exec.