My users will be logging into a secure windows xp workstation. They will be launching a jboss portal (app server = 4.2.2.GA, portal = 2.6.5) web application. This web application currently has them log in again. I can set this up to authenticate against an LDAP server but what I really want is to have them be authenticated based on the windows xp login they already used to get on the workstation. So the user experience would be to login to the windows workstation and then launching the website would go to the first logged in page.
I have no experience working this stuff so I would love some reference material.