Blank page when downloading a file from Dataverse

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Posted on by WebPortal

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My app is allowing users to download files from Dataverse.

It works well when the user is signed into what I believe is CRM dynamics, but when is not, the download opens a blank page.

Example: with this URL:

https://mydomain.crm4.dynamics.com/api/data/v9.2/pg_attachmtoses(fdfdsfae)/pg_anexo/$value

If the user opens https://mydomain.crm4.dynamics.com/ and signs in, he's able to download the files, but if the login cookie isn't present in the browser, he gets a blank page.

Is there a way to get around this?

Any help?

Thanks in advance!

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Microsoft Dataverse with Power Apps

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MichaelFP 1,847 Super User 2025 Season 2 on at

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you are providing the URL as a link do download the file? If you are doing that it will always not work if the user is not logged in in the system.

"https://mydomain.crm4.dynamics.com/api/data/v9.2" it is a webapi that is required to be authenticated to make the request. So the user will always be authenticated to be able to retrieve. if your are not logged in you must send the OAuth authentication before do the request.

This is not like a file inside a folder on a hosted website. that you just click and will return the binary. if you want to some similar i would recommend to user Azure Blog Storage for that.

Here is more information about authentication Authenticate to Microsoft Dataverse with the Web API (Dataverse) - Power Apps | Microsoft Learn

If my answer helped you, please give me a thumbs up (👍). If solve your question please mark as answer ✔️. This is help the community.

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Shashank Bhide 942 Moderator on at

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no easy solution if you don't have a developer on your side who knows how to connect to Dataverse using C# or power automate, one way is to create a function app/power automate which connects to Dataverse and downloads the file using the path you mentioned then streams that file's binary data over HTTP as response and your client browser will receive it as a downloaded file.

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MichaelFP 1,847 Super User 2025 Season 2 on at

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Create a power automate that you can call by HTTP request of type get.

Retrieve the file and response with the file.

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WebPortal 2,295 on at

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Hello all,

Thanks for your support with this matter, it is becoming an important issue for multiple apps I've developed.

If anyone is aware of more detailed documentation for a solution, I'd really appreciate.

Thank you!

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