Power Platform Community Forum Thread Details

@CU30070508-1

You're trying to connect Azure AI Document Intelligence with Power Automate using the free tiers of both services, and you're encountering the error:

"cloud connector call failed with status code 'Bad Request'"

This issue is common when integrating custom-trained models from Azure Document Intelligence Studio into Power Automate, especially when not using AI Builder. Here's a breakdown of what’s likely happening and how to resolve it.

🔍 Root Cause of the "Bad Request" Error

Based on internal documentation and recent forum discussions , the error typically stems from one or more of the following:

Authentication mismatch: The connector may not be properly authenticated to access the Azure AI model.
Incorrect endpoint or model ID: If you're using a custom model, ensure the endpoint and model ID match exactly what Azure Document Intelligence Studio provides.
Unsupported configuration in free tier: The free tier of Power Automate may not support direct integration with Azure-hosted models unless routed through AI Builder or premium connectors.
Missing headers or malformed payload: If you're using an HTTP connector, the request might be missing required headers like Content-Type: application/json or the body might be incorrectly formatted.

✅ Recommended Fixes

1. Use AI Builder Instead of Direct Azure Model

If possible, retrain or import your model into AI Builder within Power Platform. This avoids connector limitations and ensures compatibility with Power Automate’s native actions.

2. Switch to Premium Tier

The free tier of Power Automate may block certain connector calls. Upgrading to a Power Automate Premium license unlocks access to custom connectors and Azure integrations .

3. Validate Endpoint and Payload

Ensure your flow uses:

The correct Azure endpoint (e.g., https://<region>.api.cognitive.microsoft.com)
A valid model ID
Proper headers:

{

"Content-Type": "application/json",

"Ocp-Apim-Subscription-Key": "

}

4. Use Azure Logic Apps as an Alternative

If Power Automate continues to block the connector, consider using Azure Logic Apps, which is more flexible for custom integrations and shares the same engine as Power Automate .

🏷️ Tag me if you have any further questions or if the issue persists. ✅ Click "Accept as Solution" if my post helped resolve your issue—it helps others facing similar problems. ❤️ Give it a Like if you found the approach useful in any way.