Building Portals, Intranets, and Corporate Web Sites Using Microsoft Servers

SharePoint Single Sign-On

SharePoint Portal Server offers a single sign-on service that makes it easier for users to access their applications within the portal. If you embed an expense-tracking or project management system in your portal that requires a separate login, you can configure SharePoint to store user credentials and map them to their SharePoint account. Users can move from one application to another without signing into each one separately.

Single sign-on maps authentication to the individual web parts. You could, for example, design a portal page with three different web parts requiring three different usernames and passwords. The single sign-on service would map all these to the appropriate credentials without prompting the user ...