Communication means have changed over the years. People used to communicate with each other primarily by phone and mail correspondence. Computer and high technology have changed the ways people communicate at work. Exchange 2003 encompasses the new communication paths and provides the capability to access corporate email from different types of networks, computers, and handheld devices in different locations, including at home, at work, and on the road.
Outlook 2003 and Exchange 2003 have been improved to provide a rich experience to users no matter how they are connected. Prior versions of Outlook and Exchange were optimized for LAN use, where networks are typically fast and reliable. When the network was fast and responsive, the quality of the user experience was great; when the network was slow and unresponsive, the quality of the user experience suffered. The latest combination of Exchange 2003 and Outlook 2003 fulfills the goal of a consistent user experience with rich support for calendaring and email management and includes new features such as Exchange Cached mode, Remote Procedure Call (RPC) over HTTP, enhanced security, antispam, and mail filtering and blocking.
Outlook 2003 is the most common Exchange client in use in corporate environments. The introduction of RPC over HTTP removes the need for Virtual Private Network (VPN) access to Exchange over the Internet. Because of this additional technology, Outlook is a great option for remote and offsite users. One caveat is that RPC over HTTP requires Exchange 2003 to be running on top of Windows Server 2003.