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Azure AD Connect Sync

MS Doc Link: What is Azure AD Connect Sync? Aka: AAD Connect, AADC, classic sync

Overview

Azure AD Connect Sync is part of the on-premises Azure AD Connect application that enables many different hybrid identity scenarios, including:

  • Password hash synchronization
  • Pass-through authentication
  • Federation integration
  • Identity Synchronization
  • Health Monitoring

As you may have guessed, Azure AD Connect Sync refers specifically to the hybrid identity synchronization capability. In this instance, the term “synchronization” refers to the provisioning, de-provisioning, and synchronization of identity objects between on premises directories and Azure AD. Azure AD Connect Sync was previously branded as DirSync and ADSync and is built upon the Microsoft Identity Manager (MIM) codebase.

Azure AD Connect is primarily used to synchronize existing identity objects (users, groups, contacts, and computers) from Active Directory to Azure AD, however, it can also be used to synchronize identity data from other LDAP directories, sql databases, and from Azure AD back to AD.