SSL VPN security improvements
Default SSL VPN security settings have been improved to help decrease the risk of network attacks. The Do Not Warn Invalid Server Certificate option has been removed and is disabled by default.
After installing FortiClient and connecting to EMS, go to Settings. You can see that by default, Do Not Warn Invalid Server Certificate is disabled.
When configuring a new SSL VPN tunnel or editing an existing one, Do Not Warn Invalid Server Certificate is unavailable.