FortiClient - VPN automatic connection after logon windows

Hi,

we have standalone Windows server 2012 r2 (no domain in active directory) with forticlient vpn onboard (credentials of vpn are different from the local credetials of the server). The vpn tunnel instauration goes up only after the login procedure in windows, I would that on the server reboot the vpn tunne goes up automatically (before the windows access). How can I do in order to have the automatic connection? It's necessary a particular script?

Thanks