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Why PPSX Files Open in Edit Mode in Teams and SharePoint
Question details
Users want to know why PowerPoint presentation show files (PPSX) do not auto-play as slide shows in web environments like Teams or SharePoint.
- Product
- Microsoft PowerPoint
- Device & OS
- not provided
- Scenario
- Uploading and sharing a completed PPSX presentation in Microsoft Teams or a SharePoint document library for others to view as an auto-playing slide show.
- Observed behavior
- Instead of launching into a full-screen slide show, the PPSX file opens in the standard PowerPoint for the web editing interface, exposing the slides to potential edits.
Keep in mind that the .ppsx file extension is a desktop-centric format designed to auto-play on local Windows machines. It is not inherently secure and does not natively force PowerPoint for the web to enter slide show mode.
Export the Presentation as an MP4 Video
Converting your presentation to a video file is the most reliable way to ensure animations play perfectly while completely removing the editing interface.
Because PowerPoint Online does not auto-play PPSX files, exporting to video guarantees that your audience will see the presentation exactly as you designed it, with all timings and animations intact.
Launch the original presentation file (PPTX or PPSX) in your desktop PowerPoint application.
Click on 'File' in the top ribbon, select 'Export', and then click 'Create a Video'.
Choose your preferred video resolution (such as Full HD) and ensure 'Use Recorded Timings and Narrations' is selected if your presentation requires them.
Click the 'Create Video' button, save the file as an MP4, and upload this new video file to your Teams channel or SharePoint library.
Restrict Editing Permissions in SharePoint or Teams
Since PPSX files can be opened in edit mode, you must apply strict file permissions to prevent unauthorized modifications.
Embed the Presentation on a SharePoint Page
You can force a presentation to display in viewer mode by embedding it directly into a modern SharePoint site page.
Use WPS Office for Reliable Presentation Viewing
If you frequently work with diverse presentation formats and want a dependable desktop experience, WPS Office provides a lightweight, highly compatible alternative to Microsoft Office. It flawlessly handles PPTX and PPSX files, ensuring your slide shows present exactly as intended on your local machine.
- 1. Download the software: Visit the official WPS Office website and download the free installation package.
- 2. Install WPS Office: Run the installer and follow the straightforward on-screen instructions to set up the suite on your computer.
- 3. Open presentations securely: Launch WPS Presentation and double-click your PPSX files to enjoy an uninterrupted, full-screen slide show experience.
Frequently Asked Questions
Does saving a PowerPoint as a PPSX file prevent others from editing it?
No. Even on desktop applications, a PPSX file is not a secure, read-only format. Anyone can bypass the automatic slide show by opening the PowerPoint application first, and then navigating to File > Open to select and edit the PPSX file.
Why does my PPSX file auto-play on my computer but not on Teams?
When opened locally, your Windows operating system associates the PPSX extension specifically with the PowerPoint Slide Show player. In Microsoft Teams and SharePoint, files are opened using PowerPoint for the web, which defaults to its standard editing interface regardless of the desktop file extension.
Can I force PowerPoint for the web to open directly in slide show mode?
PowerPoint for the web does not natively support auto-launching into slide show mode from a standard SharePoint or Teams file link. Using a view-only sharing link, exporting to video, or embedding the presentation in a SharePoint page are the only reliable workarounds.
