Go to WiFi and Switch Controller > Managed FortiAPs. Select the FortiAP unit you want to register. Right-click and select Registration.
Importing your Intermediate CA: Browse to System > Certificates. Select Import > CA Certificate. Browse to the location and path of your Intermediate CA certificate. Click OK. Your Intermediate CA should be under the CA Certificate section of the certificates list.
Tickets for assistance with Fortinet products may be created through the Support Portal at by selecting 'Create a Ticket' from the 'Support' dropdown option. Alternatively, click on the Product List option and then click on the serial number and then click on create a ticket.