Forum Discussion

CoralieSimonaire's avatar
CoralieSimonaire
Iron Contributor
Aug 28, 2026

Copilot Studio agent suddenly stopped working in Teams

Hello, I've run into a strange issue with a Copilot Studio agent and I'm trying to understand where to investigate next. The agent is published to the "Teams and Microsoft 365 Copilot" channel and ...
ai agents
copilot studio
microsoft copilot
sohnash's avatar
sohnash
Iron Contributor
Sep 17, 2026

Hello CoralieSimonaire​ , how are you? Did you manage to find a solution to this issue?

I've seen cases where the agent responses weren't consistent in Teams - it sometimes didn't look at the right knowledge and gave answers that were irrelevant. The same agent worked fine in M365 Copilot app (and also in Copilot Studio). 

Below is what fixed this for us as we realized that Teams and Copilot weren't using the same connection - I do not know the root cause for this though 🥲

  • Go to your M365 Account 

    https://myaccount.microsoft.com/agents

  •  

    Manage Agents > Search for this agent (in my case it showed 2 entries when there should have been only one)
  • Disable the incorrect version

However, seems like your case is different as the conversation/session doesn't seem to even start. But may be worth checking the recommendation just in case it helps - and if the issue isn't already fixed :)