Message Center

Notices Microsoft posts in the Microsoft 365 admin center, with the changes this installation saw between versions. Collected today from Observed in a reference Microsoft 365 tenant (Reference tenant (MVP)). Verify applicability in your own tenant's Message Center..

Graph API changes M365 roadmap

Versions captured by this deployment. Earlier versions and notices may be missing; first observed is not first published.

7Action dates in the next 30 days 9Prevent or fix issues 404Rolling out or changing 46Updated after first seen

Showing Microsoft Defender XDR only · all services

12 notices

Newest change first

MC1387578 (Updated) Microsoft Defender for Office 365: Localized default mark and notify email template
Stay informed · Microsoft Defender XDR · changed 15 Oct 2026Updated messageNew featureUser impactAdmin impact
MC1490905 Microsoft Defender for Office 365: Post-delivery protection for malicious QR codes in Microsoft Teams
Stay informed · Microsoft Defender XDR · changed 7 Oct 2026Feature updateUser impactAdmin impact
MC1279093 (Updated) Microsoft Defender for Office 365: Enhancing how we handle promotional mail
Plan for change · Microsoft Defender XDR · changed 2 Oct 2026Major changeUpdated messageNew featureUser impactAdmin impact
MC1478463 Microsoft Defender for Office 365: Teams user reporting enabled by default
Plan for change · Microsoft Defender XDR · changed 25 Sep 2026Major changeUser impactAdmin impact
MC1388718 Microsoft Defender for Endpoint: Update to Linux connectivity requirements with new service URLs to allowlist
Plan for change · Microsoft Defender XDR · changed 23 Sep 2026Updated messageUser impactAdmin impact
MC1478005 Microsoft Defender for Office 365: View approver details for remediation actions in Advanced Hunting
Plan for change · Microsoft Defender XDR · changed 23 Sep 2026Feature updateUser impactAdmin impact
MC1476237 Microsoft Defender for Office 365: Remediation actions from the Teams message entity flyout
Stay informed · Microsoft Defender XDR · changed 21 Sep 2026Feature updateUser impactAdmin impact
MC1474106 Microsoft Defender for Office 365: New MessageContents table in Advanced Hunting for Microsoft Teams messages
Stay informed · Microsoft Defender XDR · changed 18 Sep 2026Feature updateUser impactAdmin impact
MC1466750 Microsoft Secure Score: New AI-readiness recommendations for device security
Stay informed · Microsoft Defender XDR · changed 3 Sep 2026New featureUser impactAdmin impact
MC1422060 (Updated) Microsoft Defender for Office 365: Prompt injection protection for email
Plan for change · Microsoft Defender XDR · changed 2 Sep 2026Updated messageNew featureUser impactAdmin impact
MC1446794 Microsoft Teams: Report security concerns in Teams meetings
Plan for change · Microsoft Teams · Microsoft Defender XDR · changed 5 Aug 2026New featureUser impactAdmin impact
MC1447673 Microsoft Teams: Users can report security concerns in group calls
Plan for change · Microsoft Teams · Microsoft Defender XDR · changed 5 Aug 2026New featureUser impactAdmin impact