Replace HTML messages in captive portal

[size="3"]Good day, [/size]

Sincerely, my post is basically like to play with HTML messages that bring default FortiGate captive portals, I have implemented one in my business and achieve edit messages Login and Login Fail, but I require users to close session, whether a popup window with this option or a browser tab, Fortinet default brings this to be the "Portal Page" opens, but by default does not come enabled so that when a user logs on my website you can of Similarly log. (attached image of the "Portal Page" to be activated)

Thank you very much for the care provided

Andres Felipe Quintero Analyst Networking C & S Technolog