The document discusses how Microsoft IT manages over 1 million devices on its corporate network using tools like System Center, Exchange ActiveSync, and Unified Access Gateway to enable secure remote access. It also highlights how Microsoft uses technologies like Windows Desktop Virtualization, DirectAccess, and Dynamic Access Control to securely manage devices and apply access policies based on identity, location, and compliance status. Effective examples are provided of how different devices are granted different levels of access and services based on their identity, location, and ability to meet compliance policies.