Symptoms
You migrate a team and get the following error:
The app '{0}' does not exists in the destination tenant. This will happen when trying to copy outgoing webhooks which are not currently supported.
Error Code
IN-915-227
Details
You can add a Webhook in your team to get notifications when certain actions are performed on a site.
When you create a new Webhook, a custom app is also created.
Because ShareGate Migrate is unable to properly identify custom apps associated to Webhooks, it is currently impossible to migrate Webhooks.