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Power Platform Community / Forums / Power Automate / Flow connection failed...
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Flow connection failed to outlook

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Hello,
 
My flow has been running fine for the past couple of years. Today it asked to reconnect to the outlook connector but I still get this error message. Any help much appreciated.
 
Error from token exchange: Runtime call was blocked because connection has error status: Enabled| Error, and microsoftforms is in the block list. Connection errors: [ParameterName: token, Error: Code: Unauthorized, Message: 'Failed to refresh access token for service: aadcertificate. Correlation Id=3f8da6fa-2057-4d1b-b7a8-98062a67e1c2, UTC TimeStamp=9/12/2024 7:22:58 AM, Error: Failed to acquire token from AAD: {"error":"invalid_grant","error_description":"AADSTS135010: UserPrincipal doesn't have the key ID configured. Trace ID: 30a1c634-86d0-4e78-b3dc-a7ae732c5900 Correlation ID: f44e6928-1509-4405-a480-fa1e1959a1f2 Timestamp: 2024-09-12 07:22:58Z","error_codes":[135010],"timestamp":"2024-09-12 07:22:58Z","trace_id":"30a1c634-86d0-4e78-b3dc-a7ae732c5900","correlation_id":"f44e6928-1509-4405-a480-fa1e1959a1f2"}'
 
Thanks,
 
Jason
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  • Suggested answer
    Michael E. Gernaey Profile Picture
    53,325 Super User 2025 Season 2 on at
    Hi
     
    in your flow are you using a Connection or a Connection Reference?
     
    I would verify the Connection itself, and if you are using a Connection, swap to a connection reference.
     
    Also are you trying to Send On Behalf of someone? As it could be that changed, since the error shows there is no Key ID for the user principal so something changed in regards to that service account and or user account. So you also need to check that.

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