Active Directory Users and Computers (ADUC) is a Microsoft Management Console (MMC) application used for managing users, computers, and other objects within a Windows Server environment. It allows administrators to create, modify, and delete user accounts, manage group memberships, and organize resources in a hierarchical structure known as a domain. ADUC provides a user-friendly interface for managing Active Directory objects, making it easier to enforce security policies and permissions. Administrators can also delegate control to other users, allowing for efficient management of large networks. Overall, ADUC is essential for maintaining an organized and secure IT infrastructure.