Part I: Overview and Architecture Provides an overview of the features of Office Communications Server 2007; describes the usages for the different server roles; and considers the infrastructure and security required for an Office Communications Server deployment.

Part II: Key Usage Scenarios Describes in-depth the scenarios that the real-time communications features in Office Communications Server 2007 enables and the technical details behind them.

Part III: Planning and Deployment Provides guidance on how to plan an Office Communications Server deployment through an example.

Part IV: Operations Describes how to administer, back up, and restore Office Communications Servers and maintain the health of Office Communications Servers by monitoring performance and events using Office Communications Server 2007 Management Console, MOM Pack for Microsoft Operations Manager 2005, and SQL Reporting.

Part V: Technical Troubleshooting and Diagnostics Provides in-depth information on diagnostics tools available in Office Communications Server 2007, including tips for troubleshooting the most common problems.

Part VI: Technical Reference Describes the internals of Office Communications Server 2007, including the architecture and components that make up the server and the fundamentals of the SIP protocol, routing, enhanced presence, and security in the product.