Microsoft Defender for Office 365: Admins can block external users in Microsoft Teams from Defender Portal Beta
Data as of 2 hours ago (9 September 2026)
Status Launched
Release month February 2026
Release ring General Availability
Products Microsoft Defender for Office 365 Microsoft Teams
Cloud instances Worldwide
Platforms Web
Description
Security admins with Defender for Office 365 Plan 1 and above can block external users from sending messages, calls, meetings invitation over Microsoft Teams via the Tenant Allow Block List in Microsoft Defender portal. Updated January 28, 2026: We are pausing rollout at this time as we address an ongoing issue. We apologize for any inconvenience.
Change history
Added to the roadmap 12 December 2025. Tracked here since 1 September 2026. Earliest target we recorded: February 2026 (since tracked — Microsoft may have moved it before we started watching).
Nothing has changed on this item since tracking began on 1 September 2026. Changes appear here as Microsoft updates the feed.