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I know that BCContainerHelper already contains a method to Publish-PerTenantExtensionApps (https://github.com/microsoft/navcontainerhelper/blob/ed6976186a082d492a95e8f59271b3bc13044d8e/BcSaaS/Publish-PerTenantExtensionApps.ps1) that uses the Automation API (https://docs.microsoft.com/en-us/dynamics365/business-central/dev-itpro/administration/itpro-introduction-to-automation-apis)

It is required to add in the Automation API functionality to upload an Extension that contains breaking changes in the schema setting SchemaUpdateMode = ForceSync. Obviously, this will work only in a Sandbox environment.
Category: Development
STATUS DETAILS
Needs Votes
Ideas Administrator

Thank you for this suggestion! Currently this is not on our roadmap. We are tracking this idea and if it gathers more votes and comments we will consider it in the future.

Best regards,
Business Central Team