Fine i got it. Basically, user wants to open dashboard document on the server and after analysis he needs a log out button to close the dashboard rather than closing the browser window. Here you need to do some fix since no default logout button is provided for xcelsius like a connection refresh button.
you can achieve a similar thing with this.
add a url button on the dashboard document.
Give the url same as the server url on which the document lies.
once the user finished with the dashboard usage when he clicks on the logout button, it will take him to the same server window from where he browsed to the dashboard.
Hope this helps…!!1