OneDrive File Issues

Fix OneDrive Upload 'Not Implemented' Error When File is Open

Elise Williams Oct 12, 2026 868 views

Question details

Users encounter a 'Not Implemented' error when trying to upload a file from OneDrive to SharePoint while the file is currently open.

How to Fix OneDrive Upload 'Not Implemented' Error

Product: Microsoft OneDrive and SharePoint
Device & OS: not provided
Scenario: Uploading a document from Microsoft OneDrive to SharePoint while the file is actively open in an application.
Observed behavior: The upload fails and the system displays an unclear 'Not Implemented' error message instead of completing the transfer.

Before you start

Ensure you have saved all recent changes to your local file and verify if you have SharePoint administrator privileges in case a session reset is required.

Solution 1

Close the Open File and Retry the Upload

Since the error is triggered by the file being actively in use, simply closing the file is often the quickest way to resolve the upload conflict.

File syncing services often encounter lock conflicts when a document is actively open in a desktop application. Closing the file releases this lock.

Save your modifications

Click 'Save' in your active application to ensure all recent edits are stored safely on your local drive.

Close the application

Completely exit the program (such as Microsoft Word or Excel) that is currently keeping the file open.

Attempt the upload again

Navigate back to your OneDrive or SharePoint portal and try uploading the file once more.

Solution 2Recommended

Revoke SharePoint User Session via PowerShell

If the error persists after closing the file, it may be caused by a temporary cache or session issue. An administrator can force a session reset.

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Frequently Asked Questions

Why does SharePoint show a 'Not Implemented' error during upload?

This unclear error typically occurs due to active session conflicts, file lock issues, or temporary cache problems when a file is left open in another desktop application during the upload process.

Do I need administrator rights to fix this OneDrive upload error?

If simply closing the open file and retrying the upload does not work, you will need a SharePoint administrator to run the required PowerShell command to reset your user session.

Can I manually upload files to SharePoint while they are actively open?

While automatic co-authoring sync is supported in many Microsoft 365 environments, manual uploads of actively open files between different web or sync clients can trigger locks or session errors. It is highly recommended to close the file before performing manual uploads.

Document & File Issues