FortiAuthenticator for AWS supports the bring your own license (BYOL) model. Licenses can be obtained through any Fortinet partner. If you don't have a partner, contact firstname.lastname@example.org for assistance in purchasing a license. This license model is stackable, allowing you to expand your VM solution as your environment expands.
For additional information on the FortiAuthenticator stackable license model, see the FortiAuthenticator datasheet.