ConnectedAgentBotNotFound error when using Connected Agents in Copilot Studio

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Posted on by HV-28101021-0

Hi everyone,

I’m currently experiencing an issue with my Copilot Studio project where all Connected Agents suddenly stopped working today (October 28, 2025).

In Copilot Studio’s Test panel, everything works perfectly — the connected agents respond normally. However, when I test the published endpoint (via WebChat or API), I get the following response:

Here’s what I’ve confirmed:

- Both connected agents are enabled and show no errors in Copilot Studio.

- I haven’t changed any configuration and redeployed on Oct 28 at 2:00 AM (UTC + 0).

This looks like a backend routing or service outage for Connected Agents.

Is anyone else facing the same problem today?

And is there an official status update or workaround from Microsoft?

Thanks in advance for any help or confirmation. 🙏

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Publish & channel management

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CTom 18 on at

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We have the same issue, as soon as we applied the premium license last week, all NEW and Republished connected agents with parent/child stopped working in the Teams and M365 environment but work find in Copilot Studio. We also have one in our environment that has not been re-published and continues to work. Error is "Sorry, the bot can't talk for a while. It's something the bot's owner needs to address. Error code: ConnectedAgentBotNotFound. " We opened a Microsoft support request last week, no update.

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Michael E. Gernaey 53,969 Moderator on at

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Hi @HV-28101021-0

I am unaware of any specific outage that would cause this (although... that doesn't mean it didn't happen and is not reported yet), I looked in my admin center, check yours please (in the New UI) for Power Platform and see if you see anything.

In the meantime, can you give a few more details on how you are connecting the agents, how they communicate etc just to see if... anything can be gained.

also while completely ugged... Can you try creating 2 new agents with very simple logic and connect them and see if they work

Oh BTW, what region are you in?

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HV-28101021-0 20 on at

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Hi @Michael E. Gernaey, thanks a lot for your response!

Here are some additional details:

I am in Vietnam. Environment Region: UAE, type Developer

Architecture: I’m using a multi-agent setup — there’s a supervisor agent that orchestrates tasks by invoking other connected agents. The supervisor agent is also deployed to communicate with the front-end via a direct link WebChat connection.

Everything had been working normally until today. After I redeployed the supervisor agent, all connected agents started returning the same error:

An error has occurred. Error code: ConnectedAgentBotNotFound

Thanks again for your reply!

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CTom 18 on at

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We are in Canada and have a call open with Microsoft and have had two calls from two different desks and they referred back to this thread as well. They have looked at publishing/republishing, licensing, power platform setting etc. All looks fine.

Issue, we have been running 2 Parent /Children agents that were routing via teams. We have been running them for a month or so. We wanted to expand out use to Web apps, and we applied a trial license of premium and seemed to apply fine but on publishing one of the previous agents it could no longer reach any of its children agents. (No changes, just premium + republish). We then thought it was because we used a trial version, so bought and applied the paid version to the same environment. Same issue.

We created a brand new simple parent and child - are you the child, response type agent. Same issue (error above). Parent can respond, child cannot. In the copilot studio environment it works fine in M365 and Teams same issue.

We have one working parent/child relationship agent now, but have not published since applying premium. We expect if we were to republish the parent we will end up with the same issue.

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sandeep_angara 430 Moderator on at

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We have the same issue. I have created a question in this forum on 22nd October (https://community.powerplatform.com/forums/thread/details/?threadid=114ed88f-2daf-f011-bbd3-0022482c11b3) and as well as a MS Support ticket. There's no resolution yet on this, Please mention me here if you find a work around or found this is resolved from Microsoft.

Thank you.

@HV-28101021-0 @CTom @Michael E. Gernaey

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Michael E. Gernaey 53,969 Moderator on at

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As of right now, it is definitely an issue for me for my tenants in other regions. My US one is not experiencing it.. I do not know if its some weird update to the A2A protocol and thats the issue, as I do not have the ability to debug it effectively while at the Conference, but its for sure an issue and I feel trapped here not being able to do much about it either.

I will be happy if any of you post back what you find please. And thanks to you all for opening tickets etc.

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RN-29101322-0 2 on at

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Error code: ConnectedAgentBotNotFound.

I see this issue in US as well.. none of our child bots are responding in teams. I dont see any issue in copilot studio. Can someone please take this up ASAP.. facing lot of issues as lot of processes are falling apart and impacting the users.

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SD-31100339-0 2 on at

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Facing the same issue in Australia zone too

"ErrorCode":"ConnectedAgentBotNotFound".

Seems to impact any bot we try to update, any help in resolving the issue would be greatly appreciated, we are not able to progress further with updates to our agents.

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WinMint 3 on at

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Same here in Bangkok.

Error "ConnectedAgentBotNotFound"

Parent agents cannot call its child agents for action.

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IF-04110735-0 2 on at

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Has this issue been resolved or not?

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