In this chapter, we looked at how to create and manipulate properties of user and group objects in Active Directory and the Windows NT SAM. We used this knowledge to show how to write a script to create thousands of users easily from a set of data in a file or from a database. We then showed how to create simple tools, such as an account unlocker, that you can use in your day-to-day management of Active Directory. Next we showed how to create groups and modify group members. Finally, we reviewed how to determine group membership and iterate through all the members of a group.