Assuming there are no other issues, here’s how you can convert it to a private app

  1. Enroll for ABM
  2. When the enrollment and account is confirmed, secure the registered Organization ID and Organization Name
  3. Create a new build
  4. Change the App Distribution Method to Private
    (appstore > General > Pricing and Availability > App Distribution Methods)
  5. Type in the registered Org ID and Org Name. Save.
  6. Attach the new build
  7. Resubmit