Warning: "This macOS device is enrolled but a macOS user account has not (yet) registered."

SimpleMDM may display the following message on the device details screen:

This macOS device is enrolled but a macOS user account has not (yet) registered.
This message indicates that the device did not fully enroll with SimpleMDM. This can happen for a number of reasons:
  1. The device is in the process of enrolling and has not completed enrollment
  2. A standard, non-administrator macOS user enrolled
  3. A mobile macOS user (via Open Directory or other network directory) enrolled
  4. The device is already enrolled to an MDM under a different local user account
To resolve this issue, verify that the device is being enrolled with a local administrator macOS user account is not already enrolled under a different macOS user account.