Issue - Client Side interaction with Copilot Studio Agent

Question

Hi Team,

We currently have a Virtual Agent (VA) developed using AngularJS and Node.js, embedded within our web application: https://mycavax.cdph.ca.gov/s/.

We are in the process of replacing this VA with a new Virtual Agent that is being developed in Copilot Studio. This new VA will also be embedded within the same web application.

For client-side integration, we plan to use the Bot Framework Web Chat JavaScript Library (a prebuilt chat component that connects to the agent through the Direct Line API) or the Agents SDK. Since the Web Chat library provides a prebuilt interface, we are conducting a proof of concept (POC) to evaluate how much UI customization is possible with it.

While establishing communication between the Copilot Studio agent and the web chat using the Direct Line API, we encountered the following error:

“Sorry, something unexpected happened. We’re looking into it. Error code: IntegratedAuthenticationNotSupportedInChannel.”

We have attempted several resolutions but have not been able to resolve the issue. Could you please assist us in identifying the cause and provide guidance on how to fix it?

Thank you for your support.