To perform backups and restores of mailboxes, whether with MAPI or with Granular Recovery Technology (GRT), you must meet the following requirements:
(Exchange 2007) On the Exchange Server install the Microsoft Exchange Server MAPI Client and Collaboration Data Objects (CDO) package. On Windows 2008 and later, install version 6.05.8022.0 or higher. On Windows 2003 and later, install version 6.05.7888 or higher.
These packages are available on the following Microsoft Web site:
Create a user account for the NetBackup Client Service and configure the log on account for this service.
See About configuring the NetBackup Client Service for backups and restores that use Granular Restore Technology (GRT) or MAPI.
More Information
NetBackup server and client software requirements for NetBackup for Exchange
Exchange server software requirements for NetBackup for Exchange
Requirements to perform backups and restores with Granular Recovery Technology (GRT)
Configuration and licensing requirements for Exchange snapshot backups and restores