This document introduces Microsoft Lync 2010 and provides an overview of unified communications. It discusses how Lync 2010 can help decrease costs through lower messaging, travel, telephony, and real estate expenses while also improving business outcomes like productivity, sales cycles, and customer issue resolution. The document demonstrates Lync 2010 and discusses Microsoft's business productivity infrastructure. It also covers Lync 2010 adoption rates, drivers of adoption, ecosystem partners, and hosting partners.