Copilot Studio agent cannot send messages in team-channel

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Posted on 31 May 2025 20:38:45 by PC-31052034-0

I created several Copilot Studio agents, in which I added the Teams+365 channel.
I published them, and I was able to access them from Teams.
I could chat with them in private chats with them, and they worked.
I could even add them to a team(to an specific channel).

The problem is that whenever I mention the agent in a post within a channel, I get the error:
"Sorry, something unexpected happened. We’re looking into it. Error code: SystemError"

The agent is not able to write in the channel, but there is a reaction to my messages.

* I tried with several agents using different options.
* I tried changing permissions in Entra for the app.
* I tried to change the permissions of the manifest and upload it to Teams-admin.

In all cases, and for all agents, the result is the same.

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CA1105 513 on 02 Jun 2025 at 10:10:54

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Copilot Studio agent cannot send messages in team-channel

Hi @PC-31052034-0,

As far as I've understood and have knowledge on product there is no direct way of interacting Teams msgs/chats using Agent but as an alternate you can create an Agent flow and send msgs to teams. You can click on + icon and then select Add an Action option then chose Create an Agent flow option to achieve this.