Unable to restore (Exchange mailbox)

Hi everyone,

I am using backupexec 2012 and i am trying to restore Exchange server 2007 mailbox using granular restore.My exchange datastore is on Storage.The account which i am trying to restore is having domain admins and also exchange admin

I am getting the below error.

Completed status: Failed
Final error: 0xe0008105 - Invalid Physical Volume Library Media Identifier.
Final error category: Job Errors
For additional information regarding this error refer to link V-79-57344-33029

Errors
Click an error below to locate it in the job log
Restore- MAILSCV-79-57344-33029 - Error - Mount failed.
Invalid Physical Volume Library Media Identifier.
V-79-57344-33029 - Unable to acquire device for the specified pool and media