In Windows Server, what tool is used to manage user accounts?

The tool used to manage user accounts in Windows Server is Active Directory Users and Computers. This management console is specifically designed for dealing with user accounts, groups, and organizational units within a Windows domain environment. It provides a comprehensive interface for administrators to create, modify, and delete user accounts, as well as to manage permissions, membership in groups, and other related tasks.

Active Directory Users and Computers allows for the efficient organization of users and resources, making it an essential tool for managing a secure and structured server environment. The other options listed – Control Panel, Task Manager, and System Configuration – serve different purposes and are not focused specifically on user account management. The Control Panel provides various system settings, Task Manager is primarily used for monitoring running processes and performance issues, and System Configuration helps troubleshoot startup options but does not directly manage user accounts.