Microsoft Defender for Office 365: Admins can block external users in Microsoft Teams from Defender Portal

Microsoft lists this Microsoft Defender for Office 365 and Microsoft Teams roadmap item as Launched, with general availability in February 2026.

Launched1 version

Facts

Microsoft id
542189
Status
Launched
Products
Microsoft Defender for Office 365, Microsoft Teams
General availability
February 2026
Release rings
General Availability
Platforms
Web
Cloud instances
Worldwide (Standard Multi-Tenant)
Status pages
Microsoft Teams status, Microsoft Defender status
First captured by us
(from our first import of this list)
Microsoft last modified
Source
Microsoft 365 roadmap · open the original at Microsoft

Microsoft says

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…

Microsoft 365 roadmap,

Read Microsoft's full post

What Microsoft changed

One version so far. If Microsoft edits it, each change shows here with what was removed and added.

  1. First version we captured ·

    As first seen: Launched
    Status
    Launched

    Seen by us · Microsoft's timestamp · Microsoft's page

Other changes for Microsoft Teams, Microsoft Defender

Last updated