Security Policy Errors

Why Microsoft Forms Disables Anyone Can Respond for File Uploads

Phi Hung Vo Oct 10, 2026 869 views

Question details

Understand why the 'Anyone can respond' setting is unavailable in Microsoft Forms when a file upload question is added.

Why Microsoft Forms Disables Anonymous Responses for File Uploads

Product: Microsoft Forms
Device & OS: not provided
Scenario: Creating a Microsoft Form that requires respondents to upload attachments or files.
Observed behavior: The option to allow anonymous responses is completely disabled or greyed out, forcing all users to sign in with an organizational account to submit the form.

Before you start

Decide whether collecting files or allowing anonymous responses is more critical for your project, as Microsoft Forms inherently prohibits combining both features.

Solution 1Recommended

Adjust Settings Based on Security Limitations

Understand the built-in Microsoft security policy and choose whether to remove the file upload requirement to restore anonymity.

Microsoft enforces a strict security policy to prevent malicious software, such as malware or viruses, from being anonymously uploaded into your organization's OneDrive or SharePoint. By requiring authentication when file uploads are enabled, Microsoft Forms ensures every uploaded file is tied to a verified user account, creating a clear audit trail.

Because this is a hardcoded system limitation, you cannot bypass it. You must configure your form either for secure file collection (requiring sign-in) or for anonymous data collection (without file uploads).

Access form settings

Open your Microsoft Form, click the three dots (...) in the top right corner of the screen, and select 'Settings' from the dropdown menu.

Review response permissions

Look at the 'Who can fill out this form' section. Notice that if your form contains a File Upload question, the 'Anyone can respond' option is greyed out and cannot be selected.

Remove the file upload question (Optional)

If allowing anonymous responses is your top priority, scroll through your form and delete any 'File Upload' question types. Once removed, return to the settings to enable 'Anyone can respond'.

Adjust Settings Based on Security Limitations

Alternative File Collection: If you absolutely need anonymous users to send you files, consider sharing an anonymous OneDrive folder link in the form description where respondents can drop files separately.

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Frequently Asked Questions

Can I bypass the sign-in requirement for file uploads in Microsoft Forms?

No. This is a mandatory security feature implemented by Microsoft to protect organizational data. There is no setting, toggle, or workaround within Microsoft Forms to allow anonymous users to upload files.

Where are the files uploaded via Microsoft Forms stored?

If you created a personal form, the uploaded files are stored in a dedicated folder within your OneDrive for Business (Apps > Microsoft Forms). If the form belongs to a Microsoft 365 Group, the files are saved in the default document library of that group's SharePoint site.

Why is 'Anyone can respond' greyed out even if I don't have a file upload question?

If there are no file upload questions, the option might be disabled by your organization's IT administrator at the tenant level. Additionally, selecting settings like 'Record name' or 'One response per person' inherently requires tracking and will also disable anonymous responses.

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