Shadow Copy Components backup of DFSR data fails on Windows 2008 R2 Netbackup Client.

Environment Details:

Master Server: AIX 6.1, NetBackup 7.5.0.5

Client: Windows 2008 R2, Clustered, NetBackup 7.5.0.5

Issue:

Backup of DFSR data from Windows 2008 R2 client failed with error 69.

"Unable to backup System State or Shadow Copy. Please check the state of VSS and associated Writers.INF - EXIT STATUS 69: invalid filelist specification"

"vssadmin list writers" from client report all writers as "Stable" and "No Error".

No application events related to VSS on Cleint

Logs from Client report that:

The backup has been tested with dedicated policy and only DFSR folder to avoid multiple streams but result was same failure.

The issue is more related to VSS and Microsoft, but any ideas to proceed will be helpful and appreciated.