FortiClient Manager : Working with FortiClient groups
 
Working with FortiClient groups
You may want to divide the managed FortiClient agents into groups in order to:
Configure group-shared settings and then install the configurations on the agents all at once.
Group FortiClient agents according to IP address, Windows Workgroup, DNS domain or operating system.
Manage a large number of agents more efficiently.
 
Each FortiClient agent can be added to only one group.