Azure AD Connect is the service that's responsible for integrating on-premises AD with Azure AD Tenant. Azure AD Connect replaces the previous versions of Windows Azure AD Sync (DirSync) and Azure AD sync components. Azure AD Connect has the following features:
- Synchronization services: This service checks whether Azure AD has the same identities as on-premises AD. If it doesn't, it will create the relevant objects in Azure AD.
- Password hash synchronization: Azure AD Connect can sync password hashes for on-premises AD users to the Azure AD Tenant.
- Federation service: Azure AD Connect can be configured to authenticate via an on-premises AD FS or Ping Identity federation service. This is used by organizations that use domain ...