Defender Unified RBAC will be enabled for new tenants with Defender for Office 365 Plan 2
Microsoft is enabling Unified RBAC for new tenants with Defender for Office 365 Plan 2 starting at the end of May 2026.
22. March 2026
Tagged: Defender
Defender for Office 365 now alerts on malicious URL clicks in Microsoft Teams
Defender for Office 365 URL click alerts are expanding to Microsoft Teams. When users click malicious links in Teams messages, alerts now appear in the Defender portal for faster detection and investigation.
14. March 2026
Microsoft Defender Tenant Allow/Block List can now block external Teams users and domains
Microsoft has enhanced the Defender Tenant Allow/Block List to support blocking external Teams users and domains, centralizing external access controls across Microsoft 365.
22. February 2026
Reporting suspicious Teams messages comes to Defender for Office 365 Plan 1
Microsoft is expanding Teams message reporting to Defender for Office 365 Plan 1, allowing users to report suspicious and false-positive messages starting February 2026.
25. January 2026
Microsoft will enable new messaging safety protections in Teams starting January 2026
Microsoft will enable new messaging safety protections in Teams for tenants using the default configuration starting January 2026.
21. December 2025
Zero-hour auto-purge (ZAP) in Teams for organizations with Defender for Office 365 Plan 1
Microsoft will enable ZAP in Teams for organizations with Defender for Office 365 Plan 1 starting in January 2026, with an opt-out option available for security admins.
30. November 2025
Remove users from Teams Chats using Microsoft Defender
Admins can now remove users from Teams group chats and 1:1 conversations directly from Microsoft Defender, helping speed up incident response and containment.
16. November 2025
Licensing updates for Microsoft Cloud products – October 2025
Microsoft retired three licenses, introduced new Microsoft 365 Copilot promotions, and announced the renaming of the E5 mini-suites for Security and Compliance.
1. October 2025
Teams now supports domain blocking via Microsoft Defender Tenant Allow/Block List
Microsoft Teams now integrates with the Microsoft Defender Tenant Allow/Block List, enabling admins to centrally manage blocked external domains across Microsoft 365 services.
28. September 2025
New security features for Teams chats and conversations are now in Public Preview
Microsoft is rolling out three new security features to Teams chats and channel conversations: Weaponizable File Protection, Malicious URL Protection, and the ability to report messages as not a security concern.
20. September 2025
Licensing updates for Microsoft Cloud products – September 2025
Microsoft has released new Defender Security and Purview Compliance add-ons for organizations with Microsoft 365 Business Premium licenses. At the same time, the Viva license with Glint has been removed.
1. September 2025
Report security risks with external users in Teams chats
Microsoft Teams has added a new capability, allowing internal users to report security risks when interacting with external users in 1:1, group, and meeting chats.
12. May 2025