(Updated) High Volume Email for Microsoft 365 now generally available [MC1243552]
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(Updated) High Volume Email for Microsoft 365 now generally available [MC1243552]

Message ID: MC1243552 (Updated) Updated May 20, 2026: We’re reminding you that billing for High Volume Email will begin soon. To avoid service disruption, ensure your billing configuration is set up before billing starts. We have updated the content below.…
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Outlook on the web: New setting to use data classification services for DLP evaluation [MC1315220]
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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…
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(Updated) Planner is now available in Outlook and Microsoft 365 Copilot [MC1309747]
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(Updated) Planner is now available in Outlook and Microsoft 365 Copilot [MC1309747]

Message ID: MC1309747 (Updated) Updated May 18, 2026: We have paused rollout of this feature at this time. We will communicate via Message center when we are ready to proceed. Thank you for your patience. [Introduction]We’re making it easier for users…
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(Updated) Outlook: Improved handling of disallowed and failed email reactions [MC1261593]
Posted inExchange Online

(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,…
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