Backup Exec requires the Oracle Agent when integrating with RMAN for backing up and restoring data files.
When you back up the database through RMAN the following occurs:
The data files are backed up by RMAN using the Oracle Agent.
Control and log files are backed up by BACKINT using the SAP Agent.
You must run the Remote Agent Utility to configure some settings before you run a backup or restore job through RMAN.
More Information
About the Backup Exec Oracle Agent
About using the SAP Agent with RMAN
The Remote Agent Utility for Windows Systems