Dive deep into the architecture of Exchange Web Servicesand master the intricacies for accessing data with the new, unifying API. Exchange Web Services offers new functionality, replacing old, disparate APIs. This practical guide introduces developers to Exchange Web Services. It includes comprehensive, in-depth coverage of the architecture and key features, including messaging, folders, calendaring, tasks, notifications, searching, availability, and autodiscovery. Developers who are moving applications using previous APIs to Exchange Web Services will learn how to determine the correct web services constructsand the implications of those decisions. This book assumes only knowledge of how to write HTTP requests, but it provides proxy examples in Microsoft Visual C#.