Fix Excel Not Showing Read-Only Mode for Shared OneDrive Files
Question details
Users editing a shared Excel file on OneDrive are not receiving a read-only prompt, which causes the system to create duplicate file copies instead of updating the original document.

- Product
- Microsoft Excel, OneDrive
- Device & OS
- not provided
- Scenario
- Multiple users are attempting to open and co-author the same Excel spreadsheet stored in a shared OneDrive folder.
- Observed behavior
- The read-only notification fails to appear for subsequent users opening the file. When they attempt to save their changes, a duplicate copy of the file is created instead of merging edits.
Ensure that your internet connection is stable and that the OneDrive desktop application is actively running and syncing without any paused statuses or pending errors.
Verify the File Access Method and Location
Ensure all users are opening the live file directly from OneDrive or SharePoint rather than editing a downloaded local copy.
Co-authoring and proper file-locking mechanisms only work when a file is actively opened from its original cloud location. If a user downloads the file to their local drive, Excel treats it as an independent document.
Confirm with all collaborators whether they opened the file directly from the OneDrive folder on their PC, or if they clicked 'Download' from the web browser and opened it from their Downloads folder.
Instruct users to navigate to the shared OneDrive folder via File Explorer (Windows) or Finder (Mac) and double-click the file there, or open it directly in Excel for the Web.
Look at the top-left corner of the Excel desktop application. The AutoSave toggle must be turned 'On'. If it is off, real-time co-authoring is disabled, which can cause read-only detection issues.

Check OneDrive Synchronization Status
Resolve any underlying OneDrive sync issues that prevent Excel from recognizing that another user has the file open.
Use WPS Office for Real-Time Co-Authoring
Avoid file duplication and read-only errors by using WPS Office's built-in cloud collaboration tools. You can easily share your spreadsheets and co-author in real time with perfect format compatibility.
- 1. Upload your file: Open WPS Office, go to the 'Cloud' tab, and upload your spreadsheet to WPS Cloud.
- 2. Share with your team: Click the 'Share' button in the top right corner of your open spreadsheet.
- 3. Set editing permissions: Change the link settings to 'Anyone with the link can edit'.
- 4. Start co-authoring: Send the link to your team. Everyone can now edit the same file simultaneously without creating duplicate copies.

Frequently Asked Questions
Why does Excel create a copy of my file with my computer name on it?
This happens when Excel and OneDrive encounter a sync conflict. If multiple users edit a file offline, or if AutoSave is disabled, OneDrive cannot merge the changes. To prevent data loss, it creates a duplicate file appended with the user's computer name.
Can I co-author a workbook using the Excel desktop app?
Yes, but certain conditions must be met. The file must be saved in OneDrive or SharePoint, the AutoSave feature must be turned on, and all users must be using a compatible Microsoft 365 version of the Excel desktop app.
How do I force an Excel file to open in read-only mode for others?
You can enforce this by opening the file in Excel, navigating to File > Info > Protect Workbook, and selecting 'Always Open Read-Only'. Alternatively, when saving the file, you can go to Save As > Tools > General Options and check 'Read-only recommended'.




