Security and identity on Azure and AWS
Directory service and Azure Active Directory
Azure splits up directory services into the following offerings:
Azure Active Directory: cloud-based directory and identity management service.
Azure Active Directory B2B: enables access to your corporate applications from partner-managed identities.
Azure Active Directory B2C: service offering support for single sign-on and user management for consumer-facing applications.
Azure Active Directory Domain Services: hosted domain controller service, allowing Active Directory compatible domain join and user management functionality.