Azure Active Directory is a comprehensive, highly available identity and access management cloud solution.
Microsoft Azure Active Directory Premium combines core directory services, advanced identity governance, and application access management. Azure Active Directory also offers a rich, standards-based platform that enables developers to deliver access control to their applications, based on centralized policy and rules.
Offer a cloud-connected, seamless authentication experience with Azure AD Connect. Integrate your single or multi-forest Active Directory, as well as other on-premises directories, with Azure AD to use one identity to access any cloud or on-premises app.