Microsoft will retire the Viva Engage user themes feature in January 2026 due to accessibility issues, removing personal theme settings and reverting users to the default theme. This change affects web, desktop, Teams, and Outlook users but not mobile apps. A new admin-led branding feature is planned. No admin action required.
Applies to: Microsoft Viva
Source: mc.merill.net — data via Merill Fernando's open archive (MIT).