FortiCloud account prerequisites
You must register FortiGate devices used with the LAN extension feature to the same FortiCloud account used to log into FortiSASE before using this feature.
To activate FortiGate management support on FortiSASE, you must purchase and apply a FortiSASE subscription license per FortiGate device registered. See the FortiSASE Ordering Guide.
For details on registering products, see Registering assets.