I'm at a complete loss here. ArcGIS Enterprise 10.9.1.
I have existing webhooks via Portal that work with Power Automate just fine.
I have a very simple test survey and have created the ArcGIS Enterprise Connector as described here. The connector steps all validate correctly and the test webhook is created in the survey which I can see in Survey123 web designer.
When I add the custom connector to a new flow and add a simple step such as send an email and then save the flow, the new webhook is successfully registered with the Survey. When I attempt to test the flow it simply sits with a spinning icon which eventually times out.
- There are no errors in Portal logs
- There are no errors in the flow checker
- If I submit a survey response, the associated Portal feature layer updates just fine, but this too fails to trigger the flow.