Nhấn Next để cài đặt NAV sẽ thấy các ứng dụng cài đặt thông qua các bước cần thiết vì nó khởi tạo hệ thống, tạo ra các thư mục, cài đặt các tập tin và cập nhật Registry. Khi cài đặt gần như hoàn toàn, bạn sẽ được phép xem các tài liệu Readme | 16 Chapter 2 Windows and Exchange 2003 Security Practices The IIS SMTP service is extended during the installation of Exchange to allow the service to expand distribution lists query the Active Directory for mailbox properties use the routing engine and provide Exchange-to-Exchange communication. All Exchange 2000 2003-to-Exchange 2003 communications are handled via the SMTP engine. One of the components is called the Advanced Queuing Engine this component processes every message that is sent on the Exchange server. Exchange 2003 Components Exchange Server is not a single large program but rather a number of small programs that each carry out specialized services. The Exchange installation process not only installs new services it extends a number of existing Windows lists the common Exchange 2003 services each service s executable service and the Windows 2000 2003 service on which this service depends. This table differs slightly for Exchange 2000 the service dependencies were flattened out so that Exchange could restart more quickly in a clustered environment. The first Exchange-specific component that starts is the Microsoft Exchange system attendant. The system attendant service runs a number of different processes. One of these processes is the DSAccess cache this cache keeps information that has been recently queried from Active Directory. The default cache lifetime is 5 minutes. As a general rule components such as the Information Store and IIS use the DSAccess cache rather than querying Active Directory over and over again. The exception to this rule is the SMTP Advanced Queuing Engine AQE . The AQE queries an Active Directory global catalog server each time it processes a message. Another process is the DSProxy process which handles querying the Active Directory for address list information that is queried by older MAPI clients Outlook 97 and 98 .This service essentially emulates the MAPI functions that the Exchange directory service
