No response from Copilot Studio Agent connected to WhatsApp

Hello Max Tay,

Greetings! Thanks for raising this question in Q&A forum.

No worries at all we will walk you through this in simple steps! The reason your agent receives the WhatsApp message but sends no reply back is almost always one of these things: the agent is not fully published, the WhatsApp channel connection is incomplete, or the agent has no topic or response configured to actually reply to incoming messages. Think of it like a phone that rings but nobody is set up to answer it the call comes in, but nothing happens on the other end.

Here are the steps to get your agent responding, explained as simply as possible:

Step 1: Make sure your agent is Published

This is the most common reason for silence. In Copilot Studio, building an agent is not enough you must also publish it before it can respond on any channel.

Go to https://copilotstudio.microsoft.com → open your agent → click the Publish button in the top right corner → confirm the publish. Wait about 1–2 minutes for it to complete.

If you have made any changes to your agent recently and did not publish again after, the WhatsApp channel will still be running the old unpublished version.

Step 2: Check that your agent has a Conversation Start topic or a Fallback response

If your agent has no topics set up to handle incoming messages, it will receive the message but have nothing to say back. In Copilot Studio:

Go to your agent → click Topics in the left menu → look for a topic called Conversation Start or Fallback → click on it → make sure there is at least one Message node in the flow that sends a reply

If there are no topics at all, create a simple one: click New Topic → give it a trigger phrase like "hi" or "hello" → add a Send a message action → type a reply like "Hello! How can I help you today?" → Save and Publish.

Step 3: Verify the WhatsApp channel connection is complete on both sides

A partial connection is a very common issue. There are two sides to the WhatsApp connection — the Azure Communication Services side and the Meta/WhatsApp Business side. Both need to be fully linked.

In the Copilot Studio portal, go to your agent → Settings → Channels → click WhatsApp → check that the status shows Connected and not Pending or Error. If it shows anything other than Connected, you may need to redo the channel setup by following the step-by-step guide here:

https://learn.microsoft.com/en-us/microsoft-copilot-studio/channel-whatsapp

Step 4: Check your Azure Communication Services resource

Your Azure Communication Services (ACS) resource is the bridge that passes messages between WhatsApp and your Copilot Studio agent. Go to:

Azure Portal → search for Communication Services → open your resource → click Channels on the left → make sure WhatsApp is listed and shows as active

Also go to Event Grid or SMS/Messaging events inside the ACS resource and check there are no errors or failed deliveries logged there.

Step 5: Test your agent in Copilot Studio first

Before testing on WhatsApp, always test inside Copilot Studio first to confirm the agent itself is working. Go to your agent → click Test your agent (bottom left panel) → type "hello" and see if the agent responds. If it does not respond even here, the issue is with the agent topics, not the WhatsApp connection. Fix the topics first, then test on WhatsApp.

Step 6: Check your Meta WhatsApp Business Account phone number status

Log into your Meta Business account at https://business.facebook.com → go to WhatsApp Accounts → check your phone number status. It should show as Connected and Quality Rating: Green. If the number shows as Flagged, Restricted, or Pending, messages will be received but replies will be blocked by Meta until the status is cleared.

If after following all these steps the agent is still not responding on WhatsApp, please share the following details in a comment and we can help further:

• Does the agent respond correctly in the Copilot Studio test panel?
• What does the WhatsApp channel status show in Copilot Studio (Connected / Pending / Error)?
• What does the phone number status show in your Meta Business account?

If this answer helps you kindly accept the answer which will help others who have similar questions.

Best Regards,

Jerald Felix.