In this screencast you will learn how to use the ACS Extensions to add sign in, sign up and authorization features to your web site. Furthermore, you wil learn how to invite users from Facebook, Windows Live ID, Google and Yahoo to your web site and manage their access level via roles. The Access Control Service (ACS) Extensions for Umbraco code sample is one extensions to Umbraco 4.7 which enables you to authenticate users from Facebook, Windows Live ID, Google, Yahoo, Active Directory and other identity providers. Setup, user management and handling of authorization policies are all seamlessly integrated in the Umbraco UI. Download the ACS Entensions for Umbraco here. All the screencasts in the series: 1 Setup2 SignIn and Authorization for Social 3 ADFS2 IntegrationFind out more about ACS: Newest samples and videos about ACSACS CodePlex Site (for code samples) Identity Training KitWindows Azure Platform Security Forum