Chapter 14 Managing Devices : Endpoint Protection : Creating the registration key
  
Creating the registration key
To register their endpoint devices with the FortiGate unit, users must enter a registration key that you create and provide to them.
To create the FortiClient Endpoint Registration key
1. Go to System > Config > Advanced.
2. Enable FortiClient Endpoint Registration and enter the key.
You can create a key containing up to 127 alphanumeric characters.
3. Select Apply.