Microsoft Exchange 2000 Server 5 CAL is for successful organizations who rely on messaging and collaboration to manage communication and information for enhanced productivity. Exchange 2000 Server, which is seamlessly integrated with Microsoft Windows 2000 Server, advances the state-of-the-art in messaging and collaboration with superior reliability, scalability, and performance, and with lower cost of ownership. Innovative new technology, such as the Microsoft Web Storage System, combines the reliability and scalability of Exchange Server with the openness and accessibility of the Web, to provide a complete repository for Web-based messaging, information management, collaboration, and applications. Advanced technologies, such as real-time data and video conferencing, instant messaging, an enhanced chat server, and support for wireless and unified messaging, establishes a foundation for new avenues of collaboration. Part Number 312-01308.