Describe Azure Active Directory and its integration with on-premises environments.

Azure Active Directory (Azure AD) is a cloud-based identity and access management service:\n\n• Provides single sign-on (SSO) and multi-factor authentication\n• Integrates with on-premises AD through Azure AD Connect\n• Supports hybrid identity scenarios with password hash sync\n• Enables conditional access policies and identity protection\n• Offers application proxy for secure remote access\n\nAzure AD Connect synchronizes identities between on-premises and cloud. Implement federation with ADFS for seamless authentication and maintain consistent security policies across environments.