Microsoft 365 Message Center

Microsoft Exchange Online will limit each organization to 3,000 dynamic distribution groups (DDGs) starting November 2025. Once the limit is reached, new DDGs cannot be created until others are removed. This change is automatic, cannot be disabled, and admins should review and manage existing DDG...

Starting January 5, 2026, Outlook for Android will require Android 10.0 or higher. Devices running Android 9.x or below will no longer receive updates or new features, though existing installations may work temporarily. Organizations should identify affected users and encourage OS upgrades.

Microsoft Defender for Office 365 will enhance the Deep Analysis tab on the Email Entity page with a refreshed UI, improved detonation chains, expanded metadata, and detailed behavior insights. Rollout starts October 2025 (preview) and November 2025 (general availability). No user action or compl...

We are announcing the ability to perform bulk actions on filtered conversations

Outlook on the web's activity-based timeout (ABT) will retire by January 2026 (February for GCC/DoD). Admins must enable Microsoft 365 idle session timeout for consistent session control across apps. Users won't auto-sign out without it. Prepare by reviewing ABT use, enabling the new timeout, and...

We are announcing the ability to block capacity for consulted conversations in

We are announcing the ability to place a consulting representative on hold

Per-user license validation has been extended to January 15, 2026. Per-user license

We are announcing the ability to select a representative automatically in consult

We are announcing the ability to create multisession apps. This feature will

We are announcing the ability to automatically restore sessions after a browser

We are announcing the ability to monitor the lifecycle of a work