Starting September 2025, Outlook for Web and new Outlook for Windows will stop displaying inline SVG images, showing blank spaces instead. This affects under 0.1% of images, improves security, and requires no user action. SVG attachments remain supported. Organizations should update documentation and inform users.
Applies to: Microsoft 365 for the web · Microsoft 365 apps
Source: mc.merill.net — data via Merill Fernando's open archive (MIT).