This chapter described the ways in which Exchange 2000 Server is integrated with Windows 2000.It gave an overview of how Active Directory is structured and described how Exchange 2000 Server works with Active Directory. It also discussed the Internet information protocols installed with Windows 2000 as well as services available in Exchange 2000 Server, such as Outlook Web Access, instant messaging, and data conferencing. In the next chapter, you'll learn how to assess your needs as an organization as you begin the planning process for migrating to Exchange 2000 Server.