Active Directory Users and Computers (n)~ An administrative tool used by an administrator to perform day-to-day Active Directory administration tasks. The tasks that can be performed with this tool include creating deleting modifying moving and setting permissions on objects stored in the directory. Examples of objects in Active Directory are organizational units users contacts groups computers printers and shared file objects. Active Directory-based activation (n)~ The activation of systems in an enterprise environment by using an established Active Directory implementation and the same key types.