Permission & Access Issues

How to Fix SharePoint Access Denied When Uploading Existing Files

Maira Mehtab Oct 21, 2026 869 views

Question details

Users receive an 'access denied' error when attempting to upload a file that already exists in a SharePoint document library.

How to Fix SharePoint Access Denied When Uploading Existing Files

Product: SharePoint
Device & OS: not provided
Scenario: A user is trying to upload a file to a SharePoint library where a document with the identical name already exists.
Observed behavior: Users with 'Add' and 'View' permissions encounter an access denied error upon upload, whereas users with 'Edit' permissions can successfully overwrite the file.

Before you start

Verify your current SharePoint permission levels and confirm if a file with the exact same name already exists in the destination document library.

Solution 1Recommended

Create a Support Request in Microsoft 365 Admin Center

Since this permission behavior requires backend verification, escalating the issue to Microsoft Support is the recommended approach to determine if it is expected behavior or a service issue.

In SharePoint, overwriting an existing file may require higher privileges than simply adding a new one. If users with 'Add' and 'View' permissions are blocked, a Microsoft 365 administrator must log a ticket to investigate whether this is a tenant-specific bug or default security behavior.

Test Across Multiple Sites

Confirm the behavior by testing the file upload process with different users and test files across multiple SharePoint sites to isolate the issue.

Log in to Admin Center

Have your organization's Microsoft 365 administrator sign in to the Microsoft 365 Admin Center using their admin credentials.

Navigate to Support

On the left-hand navigation pane, click on 'Support' and then select 'New service request'.

Submit the Ticket

Describe the specific permission issue detailing that users with 'Add' and 'View' rights get an access denied error when uploading existing files. Submit the request for Microsoft to investigate.

Create a Support Request in Microsoft 365 Admin Center

Administrator Privileges Required: Only users assigned the Microsoft 365 administrator role have the necessary permissions to access the Admin Center and create service requests.

Solution 2

Temporarily Upgrade User Permissions to 'Edit'

Granting 'Edit' permissions can serve as an immediate workaround, allowing affected users to successfully upload and overwrite existing files.

Free Microsoft Office alternative

Switch to WPS Office for Seamless Document Collaboration

If complex SharePoint permission settings are slowing down your team's productivity, consider using WPS Office as a lightweight, user-friendly alternative. It offers full compatibility with Microsoft Office files and straightforward cloud sharing without the enterprise-level administrative overhead.

1. Download and Install: Visit the official WPS Office website to download the free installation package for your operating system.
2. Open Existing Documents: Launch WPS Office and directly open your existing .docx, .xlsx, or .pptx files without worrying about compatibility issues.
3. Share and Collaborate: Use WPS Cloud to share files via a simple link, easily controlling read or edit permissions for your team members.

100% compatible with Microsoft Word, Excel, and PowerPoint file formats.Free, lightweight, and fast alternative to heavy Microsoft 365 installations.Built-in cloud collaboration tools with intuitive and simple sharing permissions.Familiar user interface that requires zero learning curve for seamless migration.

microsoft office alternative - wps office

Frequently Asked Questions

Why do I get 'Access Denied' when I have Add permissions in SharePoint?

In SharePoint, the 'Add' permission allows you to upload new files, but it does not automatically grant the right to overwrite or delete existing files. Attempting to overwrite a file with the same name often requires 'Edit' or 'Contribute' permissions, triggering the error if you lack them.

How can I check my current SharePoint permissions?

Click the Settings gear icon on your SharePoint site, select 'Site permissions', and then choose 'Advanced permissions settings'. Use the 'Check Permissions' tool found on the top ribbon and enter your name to verify your exact permission levels.

Can a user with only 'View' permissions upload files?

No. Users who only have 'View' permissions are restricted to reading and downloading documents. They cannot add, modify, overwrite, or delete any files in a SharePoint document library.

Will deleting the existing file solve the upload error?

Yes, if the existing file is removed, a user with 'Add' permissions can upload the file as a new document. However, users with only 'Add' permissions typically do not have the rights to delete files, so a user with 'Edit' or 'Delete' permissions must remove it first.

Document & File Issues