Chapter 17 System Administration : Central management : Backup and restore configurations
  
Backup and restore configurations
A FortiManager unit stores configuration files for backup and restore purposes. A FortiManager also enables you to save revisions of configuration files. Configuration backups occur automatically when the administrator logs out or the administrator login session expires.
FortiManager also enables you to view differences between different configurations to view where changes have been made.
See Also
Adding a FortiGate to FortiManager
Configuration through FortiManager
FortiGuard
Administrative domains