Reason for app rejection: Guideline 3.2 - Business

Users come to the App Store expecting to find apps they can pick up and use, so we check every app to see if it is meant for a wide audience. For apps designed to be used by a specific business or organization, we work with developers to choose the right distribution option for their app.

We found in our review that your app is designed to be used by a specific business or organization, including partners or employees. Custom app distribution through Apple Business Manager or Apple School Manager is the best way to make these kinds of business apps available to your target audience."

What does it mean?

How to resolve it? 

Follow these steps to distribute your app using custom app distribution:

1. Have the business or organization your app is designed for enrolling in Apple Business Manager or Apple School Manager.
2. Change your Pricing and Availability setting in App Store Connect to make your app available to specific businesses or organizations.
3. Resubmit your app for review. 

Once the app has been published, businesses and organizations will be able to find your app on Apple Business Manager or Apple School Manager.

Do I need to generate a new build?

No.