Launching external system from related action

Hi Appian Experts,

I have a requirement where i want to launch external system directly from related action without user interaction/extra click on UI.

External system should launch soon as i click on related action. 

Creating UI task with giving safe link will not work here as user interaction  not required, also, webContentField component will not work here because launch URL is not safe url(it's http url) .

Any quick help will be highly appreciated.

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