M365 Archive

RM492985 - Microsoft Teams integration with Microsoft Defender for Office Tenant/Allow Block List for domains

Microsoft 365 Roadmap

Summary

Security and IT admins can increase domain-level control with the Tenant Allow/Block List feature in the Microsoft Defender portal to block domains for Microsoft Teams. This post was published previously with incorrect information and has been corrected. We apologize for the inconvenience.

Roadmap ID

492985

View in M365 Roadmap

Last Updated

Dec 17, 2025

Published May 14, 2025

Status

Launched

Release

General Availability
Targeted Release

Platforms

Web

Service

Microsoft Defender for Office 365
Microsoft Teams

Tag

Launched
General Availability
Targeted Release
Worldwide (Standard Multi-Tenant)

Cloud

Worldwide (Standard Multi-Tenant)

Description

Security and IT admins can increase domain-level control with the Tenant Allow/Block List feature in the Microsoft Defender portal to block domains for Microsoft Teams. This post was published previously with incorrect information and has been corrected. We apologize for the inconvenience.

GA date: December CY2025