Backup of Windows 2012 NTFS deduped volumes

I'm wondering why in the NetBackup 7.x SCL is stated the following:

"Regarding the Microsoft Windows 2012 NTFS data deduplication feature:
- NTFS deduplication volumes may be backed up to BasicDisk storage units only."

Did anyone tried to use a deduped (MSDP) stu ?

I'm using a 5220 appliance and also with accelerator option enabled , backups are working correctly in optimized mode.

Any idea or experience to share ?

Is the scl wrong or are there known issues using a MSDP STU ?

Thanks,

Stefano