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Power Platform Community / Forums / Power Automate / Unable to run a flow d...
Power Automate
Suggested Answer

Unable to run a flow due to broken connection.

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Posted on by MR-02031402-0 2

I’ve been trying to run a flow that should trigger when an email arrives in my mailbox and then save the email to a shared folder. This process worked correctly with my previous mailbox, but after switching to the new one, the workflow fails to connect.

The error I’m receiving is:

Operation: Create; Exception: [Status Code: NotFound; Reason: No mailbox with such GUID.]

I’ve already updated the mailbox details and refreshed the connection for each step in the flow, but the issue still persists.

Categories:
Using connectors
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  • Suggested answer
    Bezanca Profile Picture
    Bezanca 688 Super User 2026 Season 1 on at
    Hey @MR-02031402-0

    I would try going to your connections and then creating a new outlook connection. Then on your power automate flow, use the new outlook connection and see if that makes a difference.
     
    If not, is the new mailbox a shared mailbox? And is your triggering using the "When a new email arrives in a shared mailbox" trigger?
     
    Thanks
    Adam
  • MR-02031402-0 Profile Picture
    MR-02031402-0 2 on at
    It's not a shared mailbox. It's my work mailbox.
    I have tried clearing the connections are add new mailbox but it didn't help.

    My trigger using the "When a new email arrives in a shared mailbox" trigger and it fails.
    Screenshot 2026-03-03 125925.png

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