MDM
BYOD
Also known as: Bring Your Own Device
Bring your own device — the policy and security questions around employees using personal phones and computers for work.
BYOD — bring your own device — covers the reality that employees use personal phones and computers for work, most commonly to check email on a personal iPhone or Android. It's convenient and almost universal, but it raises a real question: what happens to company data on a device you don't own when that person leaves, especially under contentious terms?
The thoughtful answer isn't to ban it but to manage it. A BYOD MDM enrollment loads a certificate — a cryptographic watermark — onto the personal device that confirms it's known and trusted, and that can be revoked if the device is lost or the person is terminated. This enables device trust: the ability to say company systems are only reachable from devices you recognize, including personal ones, without taking full control of the employee's phone.
On Apple, this works through a managed Apple ID, which is one more reason to manage Apple identities from the start.