portal log out back to log in page

I know this is a newbie question, but we set up our test S3 portal so that when you log out it redirects to the log in page.  

I want our new production S3 portal to do the same, but I have forgotten how to set the log out redirect to the log in page.

Where is this set?

On the log out from test portal the directive is to /lawson/portal/index.htm

On the production portal, the directive is to /SSOServlet?_action=LOGOUT

Thanks