File Sharing Problems

How to Fix Invalid URL Errors When Uploading Files to a Form

Aamir Naveed Akram Oct 10, 2026 869 views

Question details

Users are experiencing file upload failures on web forms, receiving an 'invalid URL' error message indicating the file or folder does not exist.

How to Fix Invalid URL Errors When Uploading Files to a Form

Product: Microsoft 365
Device & OS: not provided
Scenario: Attempting to attach and submit a file as a response to a web-based form.
Observed behavior: The form rejects the file upload, displaying an error message stating that the file or folder does not exist or is not located in the current web.

Before you start

Before escalating the issue, verify that your internet connection is stable and that the file you are trying to upload has not been recently moved, renamed, or deleted from your local device.

Solution 1Recommended

Contact Your Microsoft 365 Administrator for Support

Because this error is tied to the Microsoft 365 environment's backend storage routing, an administrator must investigate the tenant's configuration.

This specific invalid URL error often occurs when the underlying SharePoint or OneDrive storage linked to the form has permission issues, broken links, or configuration errors. Standard users cannot resolve these backend tenant errors themselves.

Identify IT Support

Locate and contact your organization's IT support team or Microsoft 365 administrator.

Access Admin Center

Request the administrator to log in to the Microsoft 365 Admin Center with their credentials.

Open Help & Support

Navigate to the bottom right of the admin dashboard and click on the 'Help & support' button.

Submit a Support Ticket

Create a new service request detailing the 'invalid URL' upload error on the specific form so Microsoft Support can inspect the environment.

Contact Your Microsoft 365 Administrator for Support

Admin Access Required: Only users with administrative privileges in your Microsoft 365 business subscription can open a support ticket directly with Microsoft Support.

Solution 2

Verify File Name and Browser Settings

Perform basic browser and file checks to rule out local browser conflicts or invalid characters before contacting support.

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Frequently Asked Questions

Why does my form say the file or folder does not exist?

This usually happens when the backend storage (like OneDrive or SharePoint) linked to the form has been moved, deleted, or has strict permission settings preventing external uploads.

Can I fix the invalid URL error myself?

If clearing your browser cache and ensuring the file name contains no special characters doesn't work, you generally cannot fix it yourself. You must contact your Microsoft 365 administrator to resolve backend routing and permission issues.

Are there file size limits for uploading to Microsoft Forms?

Yes, file size limits are set by the form creator (typically ranging from 10MB to 1GB). However, exceeding the size limit usually triggers a 'file too large' error rather than an 'invalid URL' error.

Document & File Issues