"Operation not allowed" on Graph API Item Preview endpoint

Python Developer 7 25 Reputation points


I have created an App registration.

Endpoint in question: https://learn.microsoft.com/en-us/graph/api/driveitem-preview?view=graph-rest-1.0

According to that document, this endpoint requires at least "Files.Read" permission. I've requested all of these: "Files.Read.All", "Files.ReadWrite", "Files.ReadWrite.All", "Sites.Read.All", "Sites.ReadWrite.All"

After acquiring the access token, I then call the preview endpoint, like so:


And receive back the error

{"error":{"code":"notAllowed","message":"Operation not allowed"}}

I have tried to preview a PNG, TXT, PDF, XLSX and CSV files.

What Am I doing wrong?

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Accepted answer
  1. CarlZhao-MSFT 38,941 Reputation points

    Hi @Python Developer 7

    Yes, it should be a POST request rather than a GET request, because it allows you to send the request body.

    By the way, the preview action is currently only available on SharePoint and OneDrive for Business, not personal OneDrive.

    1 person found this answer helpful.

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  1. Python Developer 7 25 Reputation points

    Ah wait wait wait ... it needs a POST request, not a GET ... i've been sending GET ... I receive this now as mentioned in the docs:

        "getUrl": "https://www.onedrive.com/embed?foo=bar&bar=baz",
        "postParameters": "param1=value&param2=another%20value",
        "postUrl": "https://www.onedrive.com/embed_by_post"
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