The Access Control Service (ACS) feature of AppFabric is a service that enables an easy way to authenticate and authorize users who want to make use of your services. It isolates authentication and authorization logic from your core code and relieves you from the burden of maintaining your own identity store. ACS simplifies the process of integrating known identity providers with your solution. This section shows how to set up ACS and how to use Facebook as your main identity provider.
In order to make use of ACS, you need to do some setting up in the Windows Azure portal.
To prepare your account to make use of ACS, follow the ensuing steps to set it up:
Browse to your Windows Azure portal environment and select the Service Bus, Access Control & Caching tab from the ribbon.
Select Access Control and click on New to create a new Access Control namespace.
Fill out the details and find a unique namespace identifier, as shown in the following screenshot...