When publishing SharePoint portal through the Microsoft UAG Server it removes the default “Sign Out” link on the SharePoint portal which is otherwise visible when accessing internally (Corporate network without going through UAG). Some people do think this as an issue but really this isn’t an issue rather a feature of UAG. UAG Portal has a “log Off” button which when used logs the user off from the main UAG portal and terminates all connections from UAG to the internal servers.