Azure Active Directory is a Microsoft platform for handling identity and authorization requirements for cloud applications.
Azure Active Directory is a Microsoft platform for handling authentication and authorization requirements for cloud applications.
Current Microsoft cloud services such as Office 365, Windows Intune, Dynamics CRM etc are powered by Azure AD (AAD).
More details available at http://azure.microsoft.com/en-us/services/active-directory/
Product group blog is at http://blogs.technet.com/ad