This document provides an overview of the FortiManager system including key features, documentation resources, and basic configuration instructions. It summarizes the new features introduced in version 4.0 MR3 including improvements to global policies, administrative domains, installation wizards, policy usability, FortiToken support, management models, licensing, and the web-based manager. It also describes the FortiManager management module and its role in centrally managing FortiGate devices and their configurations.