FortiGate Next Generation Firewall utilizes purpose-built security processors and threat intelligence security services from FortiGuard labs to deliver top-rated protection and high performance, including encrypted traffic.
Article Id 194093
The FortiGuard services and support contract details shown on the FortiGate unit should normally be synchronized with the contracts details shown in the Asset Management section of the Fortinet Customer Service and Support web portal:
If the licences on the FortiGate unit show as being expired even though an active contact has been registered, it is possible to force the unit to update the contract details.

Go to System > Config > FortiGuard page and expand "AntiVirus and IPS Options" and click on the "Update now" button.  This will manually initiate an update.

Wait for five minutes and the registration should be synchronized with the values shown on the Fortinet Customer Service and Support web portal.