Web portal and Active Directory?

[Proud to be a Nerd!!!]

I'm running Win2k3 domain, with Exchange & Sharepoint. Not all of our workstations use active directory. I am trying to create an employee web portal that provides a single sign-on to exchange & sharepoint, as well as some other resources at the same time. I know it can be done, I just can't find any example scripts/tutorials that would help. Where do I begin?Thanks.What I really want is for users to enter their active directory username and password to login to the employee portal. After they have logged into the portal, they can click on a link that takes them to exchange OWA or sharepoint without having to enter their username and password again.

[www.iklanoke.com]

you mean web directory like http://www.zorg-directory.com or some kind like yellow pages?