Microsoft has enhanced the Defender Tenant Allow/Block List to support blocking external Teams users and domains, centralizing external access controls across Microsoft 365.
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.
Microsoft will enable new messaging safety protections in Teams for tenants using the default configuration starting January 2026.
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.