File Cannot Open

Fix PowerPoint PPTX Files Not Opening from SharePoint-Mapped Location

Muhammad Talha Sep 28, 2026 869 views

Question details

Users are unable to open PowerPoint PPTX files directly from a SharePoint-mapped location in File Explorer, though older PPT files and other Office formats work normally.

Fix PowerPoint PPTX Files Not Opening from SharePoint-Mapped Location

Product: Microsoft PowerPoint, SharePoint
Device & OS: not provided
Scenario: Attempting to open presentation files by double-clicking them within a SharePoint-mapped network drive.
Observed behavior: PPTX files fail to open when double-clicked in File Explorer, but they open successfully when accessed via SharePoint online or through the PowerPoint application's File menu.

Before you start

Verify your internet connection and ensure that you have the correct permissions to access the SharePoint-mapped drive before attempting any fixes.

Solution 1Recommended

Open PPTX Files Directly Through the PowerPoint Application

Since double-clicking from File Explorer fails, opening the file directly from within PowerPoint serves as a reliable workaround.

This method bypasses the File Explorer network mapping bugs by allowing PowerPoint to handle the file retrieval directly through its own internal browser.

Open PowerPoint

Launch the Microsoft PowerPoint application on your computer.

Navigate to Open

Click on 'File' in the top-left corner of the ribbon, then select 'Open' from the sidebar menu.

Browse for the file

Click 'Browse' and navigate to your SharePoint-mapped drive location.

Select and Open

Select the target PPTX file and click the 'Open' button.

Open PPTX Files Directly Through the PowerPoint Application

Reliable Workaround: This workflow generally bypasses the mapped location errors and allows seamless editing.

Solution 2

Disable Preview Pane and Check Trust Center Settings

File Explorer's Preview Pane and strict Trust Center settings can sometimes interfere with opening network files.

Solution 3

Escalate to Microsoft 365 Support

If the issue persists across multiple users and computers, tenant administrators should contact Microsoft Support for advanced log collection.

Free Microsoft Office alternative

Try WPS Office for Seamless Presentation Management

If Microsoft PowerPoint continues to struggle with mapped network drives, consider switching to WPS Office. It provides a lightweight, highly compatible alternative for opening, editing, and managing your presentation files without the hassle.

1. Install WPS Office: Download and install WPS Office Free from the official website.
2. Open WPS Presentation: Launch the WPS Presentation application from your desktop.
3. Open Your File: Click 'Open' and select your PPTX file directly from the mapped drive to start editing.

Fully compatible with Microsoft PowerPoint PPT and PPTX formats.Reliably opens files from network and mapped drives without locking errors.Lightweight software that opens large presentation files quickly and smoothly.Familiar user interface ensuring zero learning curve and seamless migration.

microsoft office alternative - wps office

Frequently Asked Questions

Why do older PPT files open from the mapped drive but PPTX files fail?

This specific issue often relates to how modern Office versions handle the XML-based PPTX format over mapped network protocols. These modern formats can sometimes trigger security locks or synchronization bugs that are not present with older binary PPT files.

Does clearing the Office cache fix SharePoint-mapped file issues?

Clearing the Office Document Cache can resolve general syncing problems. However, in cases where a specific file type like PPTX consistently fails to open for multiple users while others succeed, a simple cache clear usually isn't enough, requiring investigation by Microsoft Support.

Is there a fast way to open my PPTX files without contacting IT?

Yes. As a quick workaround, you can open the PowerPoint application first, go to File > Open > Browse, and navigate to the mapped SharePoint location from within the software. This bypasses the File Explorer error.

Document & File Issues