On the companion Web site, you’ll find four tastefully appointed appendices that will prove useful in your Exchange Web Service development experience.
Appendix A "Response Codes," provides the error response codes that are defined in the Exchange Web Services schema, what they mean, and what Web methods you may encounter them from.
Appendix B, "Calendaring Supplementals," provides additional source code to aid in calendaring development.
Appendix C, "Mapping to MAPI Properties," talks about the property paths exposed in Exchange Web Services, the MAPI properties that each maps to (if applicable), and the operations that can be performed on each property.
Appendix D, "SP1 Feature Review," offers a quick view of the Exchange Web ...