All PowerPoint add-ins say “blocked by your administrator” since the outage

Hi 1990Quebec,

Thank you for providing the detailed information and screenshot.

Since multiple unrelated add-ins, including Web Viewer 2.0, draw.io Diagrams, and Mentimeter, started failing at approximately the same time, this may be related to a Microsoft 365 service issue or a problem retrieving the information and policies required to start Office add-ins. The message stating that an add-in has been blocked does not necessarily confirm that your administrator intentionally blocked it.

Your Microsoft 365 administrator can review the following:

1. Confirm whether other users in the organization experience the same issue.
2. Test the add-ins in PowerPoint for the web to determine whether the issue is limited to the Windows desktop application.
3. In PowerPoint, go to File > Account > Account Privacy > Manage Settings and confirm that the required connected experiences are enabled.
4. Verify that no recent Microsoft Intune, Group Policy, Microsoft 365 Apps cloud policy, firewall, proxy, or SSL inspection change is blocking Office add-ins or access to AppSource.
5. Sign out of PowerPoint, close all Office applications, reopen PowerPoint, and sign in again to refresh the account and policy information.
6. Make sure Microsoft 365 Apps is fully updated by going to File > Account > Update Options > Update Now.

Because the problem began after the Microsoft 365 outage and affects multiple add-ins, I also recommend that your administrator open a support ticket from the Microsoft 365 admin center > Support > Help & support. Microsoft Support can review the tenant’s service diagnostics, policies, and relevant logs to determine whether this is related to the recent outage or another service-side issue.

When submitting the ticket, include the affected users, approximate time the issue started, PowerPoint version and build number, the names of the affected add-ins, screenshots of each error, and the results of testing in PowerPoint for the web.

For detailed guidance on how to open a support ticket with Microsoft Support, please refer to: Get support - Microsoft 365 admin | Microsoft Learn  

I hope this information is helpful. Should you have any further questions or need additional assistance, please feel free to share them in the comments below. I will be happy to help.  

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