What must be done before enrolling Mobile Devices?

Before enrolling mobile devices in Microsoft Intune, it is essential to set Intune as the Mobile Device Management (MDM) authority in Active Directory. This step is crucial because it establishes Intune as the primary service responsible for managing and securing mobile devices within the organization. By designating Intune as the MDM authority, you enable various management capabilities, such as policy application, application deployment, and device compliance monitoring.

Other aspects, like updating device firmware or connecting devices to a secure network, may enhance the overall device management experience or ensure security during use, but they do not directly relate to the initial enrollment process. Similarly, while ensuring that users have proper licenses is important for the overall operation of Intune and the functionality available to users, it is the selection of Intune as the MDM authority that is a prerequisite for the enrollment itself.