Sharepoint authorization

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Posted on by CU28060308-0

Hey everyone,

Really need help on this one.

My admin tells me I have read write access on a Sharepoint folder and I can see that since I can read and write in it in my file explorer but I always get the "-2147024891","System.UnauthorizedAccessException" error when trying to use the "list a folder" on my folder.

What specific permission do I need? Am I doing something wrong?

    "body": {
        "status": 403,
        "message": "Accès refusé.\r\nclientRequestId: ae34bc74-beb5-430f-a932-21d564fab33c\r\nserviceRequestId: 5f6baca1-c0f8-9000-66de-c445d465a502",
        "source": "example",
        "errors": [
            "-2147024891",
            "System.UnauthorizedAccessException"
        ]
    }
 

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stampcoin 5,158 Super User 2026 Season 1 on at

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@CU28060308-0 Hi,

You access right is not enough for running the flow.

you can tell your admin, that the flow need to invoke SharePoint REST API.

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CU28060308-0 35 on at

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Can you be a bit more specific please ? I also tried the Sharepoint HTTP request action and I get exactly the same answer, forbidden.

SharePoint - Connectors | Microsoft Learn

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David_MA 14,614 Super User 2026 Season 1 on at

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One way to determine if you truly do have read/write access would be to open the SharePoint site and navigate to where you want to create an item and try to create an item. Based on the error message, it would indicate that you don't have the necessary permissions.

You should also check to see if the folder has unique permissions. One of the site owners can check this for you and can then check if you have access.

Another alternative would be to request owner access to the SharePoint site. With owner permissions, your access to all of the files can only be removed if your owner access is revoked.

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CU28060308-0 35 on at

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Thanks for the support,

I am able to create a document in the folder I'm trying to use the ListFolder action on. I then should have read/write access.

My admin also confirmed me that there is no access control policies configured for the environment I'm using. Is there something else they should check to make sur I'm able to perform actions on the sites folder?

Since I got the answer "System.UnauthorizedAccessException", I figured I used the right site adress and file identifier but could it be whats causing my bad response?

My folder url is https://compagny.sharepoint.com/sites/COMPAGNYSITE/Documents%20partages/Forms/AllItems.aspx?id=%2Fsites%2FCOMPAGNYSITE%2FDocuments%20partages%2FGeneral%2FTARGETFOLDER

and I used :

site adress = https://compagny.sharepoint.com/sites/COMPAGNYSITE

file identifier = the id in the url I get when I click on the "copy link" for the target folder on Sharepoint online

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David_MA 14,614 Super User 2026 Season 1 on at

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To provide additional help, you will need to show the configuration of the action. With your current screen shot, especially since it is not in English, there isn't any information we can go on to provide further assistance.

Since this is a manually triggered flow, do the connections run on the account of the owner or the person who triggers the flow. If the flow runs on the account of the person who triggers it, everyone who can run the flow needs access to the SharePoint site as well.

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CU28060308-0 35 on at

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Thank you David,

Here is what my flow looks like

Its using my personal connection (automatisation@firmaplus.ca) to run the flow and the listFolder is also using this connection.

With this connection I am able to read and write on the folder in a web browser.

The flow exist in the Automatisation Firma environment

Please see the attachment

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