If no device identifier is specified during registration (such as UDID, IMEI, and Serial Number), Workspace ONE UEM uses these attributes to match an enrolled device to its registration record automatically.

When inadequate registration information is provided, the following ranking allows Workspace ONE UEM to register devices successfully.

  1. User to whom the device is registered.
  2. Platform (if specified).
  3. Model (if specified).
  4. Ownership type (if specified).
  5. Date of the oldest-matching registration record.