Permission & Access Issues

Fix Microsoft Forms File Upload Access Denied for Specific Users

Bushra Parveen Oct 10, 2026 869 views

Question details

Specific users within an organization are unable to upload files to a Microsoft Form, while others can successfully submit files.

How to Fix Microsoft Forms File Upload Access for Specific Users

Product: Microsoft Forms
Device & OS: not provided
Scenario: Users are attempting to submit a response with a file attachment to an organizational Microsoft Form but are blocked.
Observed behavior: Two specific users encounter an error or are blocked from uploading files to the form, despite having organizational access and potentially folder edit permissions.

Before you start

Ensure you have administrator or owner access to the Microsoft Form, and verify whether the form was created as a personal form or a group form.

Solution 1Recommended

Verify OneDrive or SharePoint Storage Permissions

Ensure the affected users have the correct permissions to write data to the backend storage where the form's uploaded files are saved.

Microsoft Forms does not store uploaded files internally. Instead, it relies on the creator's OneDrive (for personal forms) or a SharePoint site (for group forms). If specific users lack permission to these backend folders, their file uploads will fail.

Identify the form type

Determine if the form is a personal form (which saves to your OneDrive) or a group form (which saves to a SharePoint team site).

Navigate to the storage folder

Open your OneDrive for Business or the respective SharePoint site. Navigate to the 'Apps' folder, click on 'Microsoft Forms', and locate the folder that matches the title of your form.

Check folder permissions

Select the form's folder, click the 'Manage Access' icon (usually an 'i' or three dots), and review the list of users who have access.

Grant required access

If the affected users are missing, manually add their organizational accounts and ensure they have 'Contribute' or 'Edit' permissions to allow file writing.

Verify OneDrive or SharePoint Storage Permissions

Automatic Permission Sync: Normally, Forms automatically handles permissions for respondents within the organization, but manual folder structure changes can break this sync.

Solution 2

Validate Account Licensing and Status

Account anomalies or missing licenses can prevent specific users from interacting with file upload controls.

Solution 3

Open a Support Ticket via Microsoft 365

If permissions and licenses are correct, backend environment issues may require Microsoft engineering intervention.

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Frequently Asked Questions

Where are Microsoft Forms file uploads stored?

For personal forms, files are stored in the form creator's OneDrive for Business under 'Apps > Microsoft Forms'. For group forms, files are stored in the associated SharePoint team site's default document library.

Why do only certain users get an upload error on my form?

This usually happens if specific users have mismatched permissions in the destination OneDrive or SharePoint folder, or if their accounts are subject to different conditional access policies within the Microsoft 365 tenant.

Can external users upload files to Microsoft Forms?

No. The file upload feature in Microsoft Forms is only available when the form setting is restricted to 'Only people in my organization can respond' or 'Specific people in my organization can respond'. External or anonymous users cannot upload files.

Document & File Issues