Invalid command. Data Protection for Exchange does not support OFFLOAD with the combination specified for backup destination and version of Windows.
The OFFLOAD option was specified with an unsupported backup destination. Data Protection for Exchange only supports offload with a backup destination of TSM or if running on a Windows System 2008 or later, backup destination LOCAL, TSM or BOTH.
The backup operation is canceled.
Retry the VSS offloaded backup operation specifying a backup destination of TSM.