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Teams trigger 'When a new message is added to a channel' returns UnknownError for specific channel

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Posted on by 行桑-03100413-0

3

I am encountering an issue with a Power Automate flow that uses the trigger "When a new message is added to a channel" (Microsoft Teams).

The flow works correctly for most channels across various teams. However, when configured to monitor a specific channel within a particular team, it consistently fails with the following error:

{
  "statusCode": 400,
  "error": {
    "code": "BadRequest",
    "message": "UnknownError",
    "innerError": {
      "request-id": "907d4c62-2aa3-4043-bf5a-891a8356876f",
      "client-request-id": "907d4c62-2aa3-4043-bf5a-891a8356876f"
    }
  }
}

I have verified the following:

The Microsoft Teams connection is active and authenticated.

The team and channel are correctly selected and exist.

The channel is a standard channel (not private or shared).

The user creating the flow is a member of the team.

Other channels within the same team work without issues using the same trigger

Despite these checks, the error persists only for this specific channel. I would appreciate your assistance in identifying the cause and resolving the issue.

Please let me know if you require any additional information or logs.

Best regards,

Categories:

Business Process Flows

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wwade 2 on at

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Teams trigger 'When a new message is added to a channel' returns UnknownError for specific channel

Experiencing the same issue as well, starting sometime between October 1st at 3:07 PM and October 2nd at 8:13 AM based on when I would have expected the flow to trigger.

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CU03101825-0 2 on at

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Teams trigger 'When a new message is added to a channel' returns UnknownError for specific channel

any suggestions? I'm experiencing this as well oddly today

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行桑-03100413-0 3 on at

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Teams trigger 'When a new message is added to a channel' returns UnknownError for specific channel

@developerAJ
Thanks for your reply. The error occurs at the trigger level — "When a new message is added to a channel". The flow does not proceed beyond this point. Other channels work fine with the same trigger.

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developerAJ 3,386 on at

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Teams trigger 'When a new message is added to a channel' returns UnknownError for specific channel

Hi

Are you receiving this error on Trigger or an action configured in the flow

1 people found this reply helpful.

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