This is the traditional model. You purchase a license (SKU like FG-VM0X ) from a Fortinet reseller. Fortinet generates a license file (usually a .lic text file) linked to the (which is generated when you power on the appliance). You must manually upload this file via the GUI or CLI.
Technically, the "license" is a file you generate, but you first need the Virtual Appliance. Fortigate Vm License Download
VM license | FortiGate / FortiOS 7.6.6 - Fortinet Document Library This is the traditional model
A dark corner of the internet offers "FortiGate VM license crack" or "unlimited license generators." Fortinet uses hardware fingerprinting (UUID of the hypervisor). Cracked licenses often contain malware, disable logs, or phone home to Fortinet resulting in immediate blacklisting. Furthermore, a cracked VM will never receive firmware updates, leaving you vulnerable to CVEs. You must manually upload this file via the GUI or CLI
The process of a is not a simple "click and save" operation; it is a secure entitlement validation through the Fortinet Support Portal. Remember: The software is easy to get, but the license is your key to production-grade security.