ICT Solutions News Desk

To maintain a high-quality and reliable experience for live Captions & Subtitles in the Microsoft 365 PowerPoint app, Microsoft is upgrading the backend service that supports this capability. As part of this improvement, older Office client versions will no longer be supported. Updating to the minimum required PowerPoint version ensures continued accessibility, performance, and reliability.

When this will happen

Upgrade by the end of September 2026

Who is affected

Organizations using Microsoft 365 PowerPoint app (Win32 or Mac)

Users running PowerPoint versions earlier than:

• Windows (Win32): 16.0.19426.20218
• macOS: 16.103.1207.4

What will happen

Users on unsupported versions will lose access to Captions & Subtitles after the listed dates.

There is no change for users on supported versions.

What you can do to prepare

Review PowerPoint client versions across your organization (Windows and Mac).

Update Office clients to:

• Windows (Win32): 16.0.19426.20218 or later
• macOS: 16.103.1207.4 or later

For more information, please contact the Service Desk on 01603 475603 or email ict@norfolk.gov.uk

The following only applies to users who use Microsoft Teams via a web browser. It does not affect Desktop and mobile Teams clients.

To maintain security, performance, and long-term compatibility, Microsoft Teams on the web will require modern browser standards. Beginning May 15th, 2026, Teams on the web will only be supported on browsers that are compliant with ECMAScript 2022 (ES2022).

When this will happen

• Now through May 14th, 2026: Users on unsupported browsers will see reminder banners.
• Beginning May 15th, 2026: Teams on the web will be blocked on non-compliant browsers.

All currently supported versions of Microsoft Edge, Google Chrome, Mozilla Firefox, and Safari are ECMAScript 2022 (ES2022) compliant. Browsers that are out of vendor support should be assumed non-compliant. A browser is considered “out of vendor support” when its publisher no longer provides updates or security fixes; these browsers should be assumed unsupported for Teams on the web.

For more information, please contact the Service Desk on 01603 475603 or email ict@norfolk.gov.uk