Adding FortiClient licenses to cluster units with a reserved management interface
You can also use the following steps to manually add license keys to your cluster units from the web‑based manager or CLI. Your cluster must be connected to the Internet and you must have configured a reserved management interface for each cluster unit.
1. Log into the web‑based manager of each cluster unit using its reserved management interface IP address.
2. Go to the License Information dashboard widget and beside FortiClient select Enter License.
3. Enter the license key and select OK.
4. Confirm that the license has been installed and the correct number of FortiClients are licensed.
5. Repeat for all of the cluster units.
You can also use the reserved management IP address to log into each cluster unit CLI and use following command to add the license key:
execute FortiClient-NAC update-registration-license <license-key>
You can connect to the CLIs of each cluster unit using their reserved management IP address.