Active Directory Federation Services (AD FS) is a Microsoft software component that authorizes users to use single sign-on functionality. The software runs on Windows Server operating systems (OS), and it is best suitable for applications and devices that lack the ability to use Integrated Windows Authentication (IWA) through Active Directory (AD). This feature also helps various systems and applications outside the corporate firewall to extend end users’ single sign-on (SSO) access. Further, it helps keep an account of usernames and passwords, reduces password management complexities, guest account provisioning, and more. ADFS on Windows Server 2022 is the latest version.