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How to Fix PPTX Files Not Opening from a Mapped SharePoint Drive
Question details
Users encounter an error in PowerPoint when trying to open presentation files directly from a mapped SharePoint network drive.
- Product
- Microsoft PowerPoint, SharePoint
- Device & OS
- Windows
- Scenario
- Attempting to launch a presentation stored on a mapped SharePoint drive by double-clicking it in File Explorer after a recent Office update.
- Observed behavior
- Double-clicking the PPTX file triggers an error and fails to launch the presentation, even though opening the identical file via the PowerPoint 'File > Open' menu still works perfectly.
Before proceeding with software updates or rollbacks, save any open presentations and ensure your Windows device has a stable internet connection.
Update Office to the Latest Build
Updating Microsoft Office to Version 2503 (Build 18623.20178) or newer will apply the official bug fix from Microsoft.
Microsoft Support has acknowledged this bug affecting the Current Channel build and has released a patch to restore File Explorer functionality for mapped SharePoint drives.
Launch Microsoft PowerPoint from your desktop or Start menu.
Click on 'File' in the top-left corner, then select 'Account' from the bottom-left menu.
Click the 'Update Options' button next to Office Updates, and choose 'Update Now'.
Allow the updates to download and install. Verify that your version is updated to at least Version 2503 (Build 18623.20178), then restart your computer.
Use the 'File > Open' Workaround
If you cannot update immediately, you can bypass the File Explorer bug by opening files from within the application.
Roll Back to a Previous Office Version
Revert to an older, stable version of Microsoft Office if the patched version is not yet available for your specific enterprise update channel.
Avoid Update Bugs with WPS Office
If Microsoft Office updates are constantly breaking your mapped network drives, consider switching to WPS Office. It provides a stable, seamless experience for accessing all your presentations directly from File Explorer.
- 1. Download the software: Visit the official WPS website and click 'Download WPS Office Free' to get the installer.
- 2. Set as the default app: During or after installation, choose to set WPS Presentation as the default application for opening .pptx files.
- 3. Open your files smoothly: Double-click any presentation in your mapped SharePoint drive to instantly open it without errors.
Frequently Asked Questions
Why do PPTX files only open through 'File > Open' and not from File Explorer?
A specific bug in a recent Microsoft Office Current Channel update disrupted how PowerPoint interprets file paths passed directly from the Windows shell for mapped SharePoint drives. Using the application's internal 'Open' dialog completely bypasses this broken shell interaction.
Will Microsoft fix the mapped SharePoint drive issue permanently?
Yes. Microsoft Support acknowledged this issue and released a patch starting in Version 2503 (Build 18623.20178). Updating your Office installation should permanently resolve the problem.
Is mapped SharePoint drive support officially deprecated by Microsoft?
While Microsoft highly encourages using the modern OneDrive sync client instead of mapping SharePoint as network drives via WebDAV, they still provide bug fixes for critical issues affecting enterprise environments that rely on this legacy method.
