What must Azure AD Connect implement for hybrid identity?

For hybrid identity, Azure AD Connect must implement synchronization of Active Directory and Azure AD. This synchronization is crucial for organizations that want to blend their on-premises Active Directory with Microsoft's cloud-based Azure Active Directory.

By facilitating the synchronization process, Azure AD Connect ensures that user identities and their associated attributes remain consistent between the on-premises environment and the cloud. This allows users to maintain the same credentials across both environments, simplifying access and streamlining user management. Moreover, it enables features such as single sign-on (SSO), which enhances user experience by allowing seamless access to both cloud and on-premises resources.

The other options do not specifically address the core requirement of hybrid identity management provided by Azure AD Connect. Multiple Microsoft 365 tenants is not a requirement for hybrid identity but refers to a different scenario involving managing multiple cloud environments. On-premises security settings, while important, do not pertain specifically to the synchronization functionality of Azure AD Connect. Integration with third-party platforms may enhance capabilities but is not a fundamental requirement for establishing a hybrid identity setup through Azure AD Connect.