(Updated) Product transitions to the cloud.microsoft domain – September 2025 [MC1162275]

(Updated) Product transitions to the cloud.microsoft domain – September 2025 [MC1162275]

Message ID: MC1162275 (Updated) Updated May 19, 2026: We are updating this post as an informational reminder to help ensure you are informed and can proactively mitigate potential connectivity issues. Please review your configurations. Thank you for your patience. [Introduction] To…
(Updated) Product transitions to the cloud.microsoft domain – September 2025 [MC1162275]

(Updated) Product transitions to the cloud.microsoft domain – September 2025 [MC1162275]

Message ID: MC1162275 (Updated) Updated May 19, 2026: We are updating this post as an informational reminder to help ensure you are informed and can proactively mitigate potential connectivity issues. Please review your configurations. Thank you for your patience. [Introduction] To…
Outlook on the web: New setting to use data classification services for DLP evaluation [MC1315220]

Outlook on the web: New setting to use data classification services for DLP evaluation [MC1315220]

Message ID: MC1315220 Introduction We are introducing a new organization-level setting that allows admins to migrate Outlook on the web (OWA) from Exchange-based Data Loss Prevention (DLP) policy evaluation to Data Classification Services (DCS)-based DLP policy evaluation. This change brings OWA…
(Updated) Outlook: Improved handling of disallowed and failed email reactions [MC1261593]

(Updated) Outlook: Improved handling of disallowed and failed email reactions [MC1261593]

Message ID: MC1261593 (Updated) Updated May 18, 2026: We have updated the timeline. Thank you for your patience. [Introduction] We’re improving how Outlook respects the x‑ms‑reactions: disallow header in Classic Outlook for Windows. This update ensures that when reactions are disallowed,…