Office Online viewer (view.officeapps.live.com) fails to open any PowerPoint file

Hi @Nadim Cham

Since this issue affects multiple users within your organization and has already been tested on different devices and browsers, I recommend asking your IT administrator to report the issue through the Microsoft 365 admin center. Please include as much information as possible, such as the affected URLs, screenshots, timestamps, browser details, and confirmation that the PowerPoint files download and open successfully outside the Office Online Viewer.

It would also be helpful to mention that the original PowerPoint files download and open normally outside the Office Online Viewer but fail when opened through view.officeapps.live.com. Providing these details may offer useful context for further review and help document the scope of the issue. The more affected users report the same behavior, the more it may help increase visibility and support further investigation toward a fix.

In parallel, please also try contacting Microsoft Support directly. They can review your tenant and account configuration, collect diagnostics or logs if need, and escalate internally for deeper investigation. Taking both approaches together is often the most effective way to move situations like this forward.

Here’s what your Microsoft 365 Global Admin (IT Admin) should do next:

• Submit a Service Request: The Global Admin should create a service request with Microsoft support to get advanced technical assistance and diagnostics. For detailed instructions on how to get support, please refer to Get support - Microsoft 365 admin.        
• Find Your Microsoft 365 Admin: If you’re unsure who the Global Admin is within your organization, you can find guidance on locating them here: How do I find my Microsoft 365 admin? - Microsoft Support.    
• If your subscription is managed through a Microsoft partner or reseller, they can also assist with opening a support request and liaising with Microsoft on your behalf.     

Note: If you’re an end-user, please coordinate with your Office 365 Global Administrator to handle these steps.    

As a fellow forum user, my role is limited to providing general guidance and basic troubleshooting, and I do not have access to Microsoft’s backend systems or internal service logs. I also do not have the ability to influence or expedite the engineering team’s investigation.

Thank you for your patience and understanding.