Hybrid Azure AD Connect architecture synchronizes on-premises Active Directory Domain Controllers with Entra ID through a dedicated sync server, enabling unified identity management across on-premises and cloud. Synced users flow from dual Domain Controllers through Azure AD Connect to Entra ID, where Conditional Access and MFA enforce security policies before granting access to Microsoft 365 Services. This pattern eliminates password synchronization complexity while maintaining on-premises AD as the source of truth, supporting organizations migrating to cloud-first identity without abandoning legacy infrastructure. Fork this diagram on Diagrams.so to customize sync schedules, add federation endpoints, or integrate additional identity governance policies. Azure Monitor and Microsoft Sentinel provide comprehensive sign-in logging and threat detection across the hybrid boundary.