This book is a functional step-by-step, easy-to-follow reference guide that explains how to use Openfire to develop a secure instant messenger network. Each chapter will tell you how to add features to your IM. Having a simple practical approach, this book is very user-friendly. This book is for System Administrators who want to set up an in-house enterprise IM system using Openfire. The reader will need experience in managing servers on any operating system.