Your organization bought 100 iPad devices from a new Apple Authorized Reseller.

For new devices purchased from an Apple Authorized Reseller or carrier to automatically appear in Apple Business Manager or School Manager, the reseller must be linked to your organization. Apple states that this is done by providing the reseller with yourOrganization IDand entering theirReseller Numberin ABM/ASM. Once the reseller’s number is configured, devices purchased from that reseller automatically populate into ABM for assignment to MDM. Customer Numbers are used when buying directly from Apple, not from resellers. Purchase orders or Org IDs alone will not ensure devices sync. The Reseller Number is the required element here.