Consider the update lifecycle
When you create a tenant-specific customization, or an extension that is scoped to a single Business Central environment (often referred to as per-tenant extensions), you must take the lifecycle of the extension into consideration.
You're responsible for your extension. You own the process of updating the extension and providing upgrade code if the schema changes between versions of the Business Central base application. When an update is available for your Business Central environment, all extensions, both AppSource extensions and tenant customizations, must be compatible with the next version of the base application before the update can be installed on the environment. You're responsible for ensuring that your extensions are compatible with the update version.
Automated extension validation
An automated service validates all tenant customizations before an update is marked for a scheduled update of an environment. This validation compares the extension's dependencies with the updated version of the Business Central application to see if any changes caused incompatibilities with the new version.
If the validation service discovers any tenant customizations that aren't compatible with the update, an email notification is sent to the tenant administrators listed on the Notification recipients tab of the Business Central administration center.
At least one email address must be specified as a notification recipient to receive the update notifications. If you don't specify an email address, you won't be notified of updates and other changes to the tenant.
The email notification provides information on the incompatible extension, detail on which properties must be updated, and steps to bring the extension into compatibility.
Update failure notification
If a Business Central environment has an extension that isn't compatible with the update version, the update can't be applied. If an update fails due to an incompatible extension, a notification is sent to the tenant administrators listed on the Notification recipients tab of the Business Central administration center.
The notification is similar to that provided by the automated extension validation. It provides information on the incompatible extension, detail on which properties must be updated, and steps to bring the extension into compatibility.
Automatic extension removal
The publisher of an extension must maintain compatibility with the new release of Business Central. An extension that isn't compatible with the update within 90 days of the first notification of incompatibility will be removed, and then the environment will be updated.