The document discusses how hybrid IT, which combines mobile devices, cloud computing, and on-premises systems, is transforming enterprise productivity. It describes the "three-legged stool" model of hybrid IT, with mobility, cloud, and traditional IT as the three legs supporting today's knowledge workers. The rise of mobile devices, cloud computing adoption, and the need to access all types of applications and data from any location has led to widespread use of hybrid IT. However, managing security risks from the distributed hybrid IT environment poses challenges for organizations. With the right security tools, hybrid IT can be implemented securely to improve productivity while mitigating risks.