can't Restore mailbox Exchange 2010 useing Backup exec 2012 if mail box content [] characters in the display name

Hi

please i need your  help when i try to  Restore mailbox Exchange 2010 useing Backup exec 2012  

if mailbox content this  [] characters in the display name give follwing error

The job failed with the following error: Cannot restore one or more mailboxes. The database that the mailboxes reside in is dismounted or is not accessible. Ensure that the server is available and that the database is mounted, and then run the job again

V-79-57344-764