FAQ: ARM-based deployment package for Managed Application offers

Q: I am working on a Managed Application offer. If I don't do metered billing, and only offer flat rate billing, is the ARM based deployment package necessary? Or can I supply a deployment package using alternate mechanisms?

A: All Azure applications must include a Resource Manager template file named mainTemplate.json and a user interface definition for the Azure application creation experiance named createUiDefinition.json. Refer to this article for additional information: Plan an Azure managed application for an Azure application offer - Marketplace publisher | Microsoft Learn