DC-to-cloud migration - Some apps are not registered to receive migration notifications

Cloud Migrations
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Hi Community,
We are currently facing an issue with one of our DC-to-cloud migration customers.

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Their cloud app is not receiving notifications, even though we have followed the recommended steps as documented in the [official Atlassian cloud app registration guide](https://developer.atlassian.com/platform/app-migration/prepare-cloud-app-connect/).

Notably, all other customers have completed their migrations successfully using the same approach. This is the first time we have encountered this issue.

Here’s what we have already done:

  1. Webhook Registration:

We registered the webhook during the add-on install phase (lifecycle event).
The request sent is:

PUT /migration/webhook Body: {"endpoints": ["https://<our-url>/migration/notification"]} Endpoint: https://<customer-cloud-site>/rest/atlassian-connect/1/migration/webhook
  1. Descriptor Configuration:**
    We added the migrationWebhookPath in our atlassian-connect.json descriptor file:
"cloudAppMigration": { "migrationWebhookPath": "/migration/notification" }

Additional Information:
After installing our app, the customer changed their cloud site URL. We’re wondering if this change might be affecting webhook delivery or breaking the migration notification flow in any way.
Despite the above setup, the cloud app does not seem to be receiving any migration-related notifications.

Could you please advise:

  • Are we missing any critical configuration or steps?
  • What additional checks or troubleshooting steps can we perform to identify and resolve this issue?

Any help or suggestions would be greatly appreciated.