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Session Id :
Power Automate - Connector Development
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Blob Folder Access

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Posted on by 10
Hello,
 
I got service principal for the blob from our IT which has reader and contributor access for my account. However, I am still not able to access the folder inside the storage account.
 
Our blob storage is on EastUS region. Could cross region cause an issue? Can we change Power Automate region or what could possible issue with this? Our IT is looking for App ID. However, I did provide that the environment ID and Flow ID - https://make.powerautomate.com/environments/Default-c6b6caf6-be06-4f0b-9273-394412dc2ab7/flows/ccfa73ed-78f5-471e-90b1-490b668a5033?v3=false. However, can't find the App ID (is it even possible?).
 
Body:
The dynamic invocation request failed with error: { "status": 403, "message": "AuthorizationFailure\r\nclientRequestId: 58972de9-0b9c-4d59-8ba3-528ed7cd12f9", "error": { "message": "AuthorizationFailure" }, "source": "azureblob-cus.azconn-cus-001.p.azurewebsites.net" }.
 
Header:
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  "Cache-Control""no-store, no-cache",
  "Pragma""no-cache",
  "Set-Cookie""ARRAffinity=9fa6c0b82e1d7da4a533be6bd9bc598a7378a1d1d9fd035b439a7dee1d6cddf7;Path=/;HttpOnly;Secure;Domain=azureblob-eus2.azconn-eus2-002.p.azurewebsites.net,ARRAffinitySameSite=9fa6c0b82e1d7da4a533be6bd9bc598a7378a1d1d9fd035b439a7dee1d6cddf7;Path=/;HttpOnly;SameSite=None;Secure;Domain=azureblob-eus2.azconn-eus2-002.p.azurewebsites.net",
  "Strict-Transport-Security""max-age=31536000; includeSubDomains",
  "x-ms-request-id""f1ad60ad-7b96-4928-aa9e-214826654b18",
  "X-Content-Type-Options""nosniff",
  "X-Frame-Options""DENY",
  "x-ms-connection-parameter-set-name""servicePrincipalAuth",
  "x-ms-environment-id""default-c6b6caf6-be06-4f0b-9273-394412dc2ab7",
  "x-ms-tenant-id""c6b6caf6-be06-4f0b-9273-394412dc2ab7",
  "x-ms-dlp-re""-|-",
  "x-ms-dlp-gu""-|-",
  "x-ms-dlp-ef""-|-/-|-|-",
  "Timing-Allow-Origin""*",
  "x-ms-apihub-cached-response""false",
  "x-ms-apihub-obo""false",
  "Date""Tue, 30 Sep 2025 13:49:41 GMT",
  "Content-Length""242",
  "Content-Type""application/json",
  "Expires""-1"
}
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I have the same question (0)
  • chiaraalina Profile Picture
    583 on at
    Blob Folder Access
     

    It seems, you’ve already created the connection using a service principal, which means you had to enter the Application (Client) ID at that time.

    To find it again, go to Power Automate → Data → Connections, click Edit on your Azure Blob Storage connection, and you’ll see the App (Client) ID there.

     

    That’s the ID your IT team needs to grant proper access.

     

    Let me know if you need help locating it.

  • bdeora Profile Picture
    10 on at
    Blob Folder Access
    Thank you @chiaraalina for your quick response. That App ID from service principal does match with the url that I shared earlier. Now idk what is causing blob folder to not appear as options in the action step. 
     
    Is my power automate Central US region? Can you tell? Could that be an issue?
  • chiaraalina Profile Picture
    583 on at
    Blob Folder Access
    Hi
     
    No, I don't think it is a region problem.
     
    Have you tried to assign the roles Storage Blob Data Reader and Storage Blob Data Contributor?
  • bdeora Profile Picture
    10 on at
    Blob Folder Access
    @chiaraalina they are both assigned all the way to folder level as well in the blob.
     
     

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