Chapter 10 Install and System Administration for FortiOS 5.0 : Advanced concepts : FortiClient discovery and registration
  
FortiClient discovery and registration
FortiOS provides a means of allowing users running FortiClient Endpoint Control software to connect to specific interfaces when connecting to the FortiGate unit. As well as ensuring that remote or local users have FortiClient Endpoint Control software installed on their PC or mobile device.
See Also
FortiClient discovery
FortiClient Registration