Streaming backups can only be performed with Exchange 2007 or earlier. NetBackup uses snapshot technology for all Exchange 2010 backups.
You can also redirect a restore to the recovery storage group (RSG).
More Information
Redirecting an Exchange 2007 snapshot backup to a storage group or the recovery storage group
Restoring an Exchange 2007 or Exchange 2003 streaming backup to a recovery storage group
About existing transaction logs
Restoring storage groups or storage group databases from a streaming backup
Restoring an Exchange 2007 or Exchange 2003 streaming backup to a recovery storage group