OneDrive File Issues

Fix Word OneDrive Upload Failed Due to Invalid Characters Error

Ayan Masood Sep 30, 2026 868 views

Question details

The user is unable to AutoSave or upload a Word document to OneDrive because the application displays an error stating the file or folder name contains invalid characters.

How to Fix Word OneDrive Upload Failed Because of Invalid Characters

Product: Microsoft Word 2021, OneDrive
Device & OS: not provided
Scenario: Attempting to use the AutoSave feature or upload a document to OneDrive from Microsoft Word.
Observed behavior: Word AutoSave stops working and triggers an invalid characters error message, even when the file or folder name contains only standard letters and dashes.

Before you start

Before troubleshooting, ensure your internet connection is stable and verify that the combined length of your file name and folder path does not exceed the 400-character limit imposed by OneDrive.

Solution 1Recommended

Reset OneDrive and Update Microsoft Office

Resetting the OneDrive synchronization application and ensuring Office is up to date can resolve background sync glitches that falsely trigger the invalid character error.

Close Office apps

Save any open work locally if needed, and completely close Microsoft Word and any other running Microsoft Office applications.

Run the reset command

Press the Windows key + R on your keyboard to open the Run dialog box. Type `%localappdata%\Microsoft\OneDrive\onedrive.exe /reset` and press Enter.

Restart OneDrive

Wait a few moments, then open the Windows Start menu, search for OneDrive, and launch the application to restart the sync process.

Update Office

Open Microsoft Word, navigate to File > Account, click on Update Options, and select Update Now to ensure you have the latest bug fixes.

Reset OneDrive and Update Microsoft Office

Temporary Workaround: If you are in a rush and cannot troubleshoot immediately, save a local copy of your document to your computer and upload it manually via the OneDrive website, or simply use Word for the Web which saves directly to the cloud.

Solution 2

Inspect the File Path for Hidden or Unsupported Characters

Even if the document's file name looks correct, hidden spaces or special characters in the parent folder names can trigger the upload failure.

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Frequently Asked Questions

What characters are strictly invalid in OneDrive file names?

OneDrive does not support names containing characters such as <, >, :, ", |, ?, *, /, or \. Additionally, file or folder names cannot end with a space or a period.

Why does AutoSave automatically turn off when saving to OneDrive?

AutoSave may automatically turn off if the file path exceeds the character limit, if there is a sync error with the OneDrive desktop app, or if the file format (like an older .doc file) does not support AutoSave.

How can I quickly bypass the upload failed error in Word?

You can bypass the error by clicking 'File' > 'Save As' and saving a local copy directly to your PC's hard drive. From there, you can manually upload the file to your OneDrive account using a web browser.

Document & File Issues