As the “bring your own device” (BYOD) trend sweeps across the business world, it raises a huge management challenge for many companies. It changes who within an organization gets access to mobility. It also affects the way a business operates, with implications that go far beyond simply IT. BYOD presents new, fundamental questions about security, liability, and cost. Answers depend on two aspects of mobility management: device management policy and the technology used to fulfill and enforce a policy.