A user has rooted their corporate phone to load unapproved software.

Mobile Device Management (MDM) allows an organization to enforce security policies, such as denying network access to jailbroken/rooted devices.

From the All-in-One Exam Guide by Travis Everett and Andrew Hutz:

“MDM software allows administrators to monitor, manage, and secure mobile devices connected to enterprise networks. One key feature is the detection and denial of access for rooted or jailbroken devices”.

Quentin Docter also confirms:

“An MDM solution can check if a device has been rooted and prevent it from accessing the network, ensuring compliance with corporate security standards”.