Businesses today rely on their messaging and collaboration servers more than ever. This reliance means that you do not just need a way to send e-mail or create groupware. Businesses need a comprehensive messaging platform that includes the tools necessary to create rich collaboration applications. Microsoft Exchange Server is that platform. It is scalable, reliable, and secure. It offers high performance and high availability. Exchange Server allows you to choose the protocols for clients that are best for them, rather than locking them into a single protocol environment. If you want to build collaborative applications that take advantage of the messaging platform, Exchange Server provides tools that help you take advantage of existing knowledge.