Follow these steps to get started with the Solution to Onboard Clients at Scale.
This Business Manager will be referred to as a Parent Business Manager. Visit the Business Manager docs to learn more.
Reach out to Meta and open a Line of Credit within that Business Manager if one doesn’t already exist. The line of credit will show up as a payment method in Business Manager.
Once you have a credit line setup in Business Manager you need to mark that as shareable so that your Child Business Managers can access it. You can do that by following these steps:

If you do not already have a Meta Business App, you can create one in your App Dashboard. Click Create App then select the Business app type. Reach out to your Meta Partner to add the app to the allow list, granting it permission to access the API endpoints used in the Two-tier Business Manager Solution.
In your App Dashboard, click App Review > Permissions and Features in the left side panel. Scroll or search for the business_management permission and click Request Advanced Access. This permission enables your app to create a Business Manager on behalf of a person.
App Review requires your app to be public, no longer in development mode, so you may want to add Basic settings, like an App icon or logo, in your App Dashboard. To learn more about App Review, please visit the App Development docs.
Create an Admin System User if one does not already exist. System users represent servers or software making API calls to assets owned or managed by a Business Manager. The easiest, quickest way to create a System User is in the Business Manager tool, see Ads Help Center, How do I add a new System User. Once you have an Admin System User, generate a long-lived access token and store it for later use.
Grant the Admin System User a Finance Editor Role by going to the People and Assets tab in your Business Manager and select Admin System User. Click the Edit button next to Admin System user's name. Now change the Finance Role to Finance Editor.
