FortiManager Firmware : Special notices : Update services provided to FortiGate v4.0 MR2 or FortiMail devices
 
Update services provided to FortiGate v4.0 MR2 or FortiMail devices
Please enable the following option in order to provide update services to FortiGate v4.0 MR2 and FortiMail devices:
config fmupdate support-pre-fgt43
set status enable
end