Microsoft will upgrade the backend service for Captions & Subtitles in PowerPoint by September 2026. Users with versions older than 16.0.19426.20218 (Windows) or 16.103.1207.4 (macOS) will lose access. Organizations should update PowerPoint to maintain this feature without changing settings.
Introduction
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
How this affects your organization:
Who is affected:
What will happen:
What you can do to prepare:
Compliance considerations:
No compliance considerations identified, review as appropriate for your organization.