DPM 2012 R2 SMB VM Backup (ID 2033 Details: A required privilege is not held by the client (0x80070522))

Hi,

I am encountering an error when trying to backup a VM in SMB share. The error was (ID 2033 Details: A required privilege is not held by the client (0x80070522)). 

There is no VSS event logged on the host.

Does anyone face this error before? Appreciate if anyone could help to enlighten.

Thanks.