You can override the navigation settings of portal on device to ensure that applications always open in the active window instead of opening a new browser window. When the Enforce Single Window property is selected, all applications in portal on device open within the content area of the portal, even if the Launch in New Window property is set otherwise. If the Launch in New Window property is set to Display in Separate Window, the URL of the portal changes to the URL of the application, instead of opening a new window.