Microsoft Defender for Office 365 will localize the default "Mark and notify" email template based on users' Outlook language settings, improving clarity in user-reported message notifications. Rollout starts June 2026 worldwide, completing by September 2026. No action is required; admins may inform users and review settings.
Applies to: Microsoft Defender XDR
Source: mc.merill.net — data via Merill Fernando's open archive (MIT).