This document provides an overview of Microsoft Exchange Server 2010 and the benefits it provides over previous versions. Exchange 2010 offers lower storage and administration costs compared to prior versions. It allows for larger mailboxes at lower storage prices and reduces support costs. Exchange 2010 also simplifies high availability, disaster recovery, backup and providing mobile access for users. It lowers compliance and e-discovery costs as well. The total cost of ownership is significantly lower with Exchange 2010 compared to Exchange 2003 and 2007. It also simplifies the upgrade and deployment process.