Chapter 10 Install and System Administration for FortiOS 5.0 : Basic Administration : Administrators : LDAP Admin Access and Authorization : Add the LDAP server to a user group
  
Add the LDAP server to a user group
Next, create a user group that will include the LDAP server that was created above.
To create a user group - web-based manager
1. Go to User & Device > User Group > User Group and select Create New.
2. Enter a Name for the group.
3. In the section labelled Remote authentication servers, select Add.
4. Select the Remote Server from the drop-down list.
5. Select OK.
To create a user group - CLI
config user group
edit <group_name>
config match
edit 1
set server-name <LDAP_server>
set group-name <group_name>
end
end