Launched
Microsoft Defender for Office 365
Microsoft Teams
Worldwide (Standard Multi-Tenant)
General Availability
Targeted Release
Web
December 2025
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.
Change History
December 17, 2025 at 12:41 AM
Updated
Title
Previous
Microsoft Defender for Office 365: ZAP Teams protection capabilities to Defender for Office Plan 1
New
Microsoft Teams integration with Microsoft Defender for Office Tenant/Allow Block List for domains
Description
Previous
Security admins with Defender for Office 365 Plan 1 can avail the benefits of Zero-hour auto purge (ZAP) and zapped admin quarantine for zapped Teams messages.
New
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.
Status
Previous
In development
New
Launched
Release Date
Previous
January CY2026
New
December CY2025
Modified Date
Previous
2025-11-18T00:00:20.000Z
New
2025-12-17T00:15:13.000Z
November 18, 2025 at 2:00 AM
Updated
Title
Previous
Microsoft Teams: Microsoft Teams integration with Microsoft Defender for Office Tenant Allow block list for domains.
New
Microsoft Defender for Office 365: ZAP Teams protection capabilities to Defender for Office Plan 1
Description
Previous
Security admins can use the Tenant Allow/Block List feature in the Microsoft Defender portal to block domains for Microsoft Teams.
New
Security admins with Defender for Office 365 Plan 1 can avail the benefits of Zero-hour auto purge (ZAP) and zapped admin quarantine for zapped Teams messages.
Status
Previous
Rolling out
New
In development
Release Date
Previous
August CY2025
New
January CY2026
Modified Date
Previous
2025-08-28T23:00:27.000Z
New
2025-11-18T00:00:20.000Z
August 29, 2025 at 12:01 AM
Updated
Status
Previous
In development
New
Rolling out
Modified Date
Previous
2025-08-08T22:15:46.000Z
New
2025-08-28T23:00:27.000Z
August 9, 2025 at 12:00 AM
Updated
Release Phase
Previous
General Availability
New
General Availability, Targeted Release
Modified Date
Previous
2025-06-16T23:15:08.000Z
New
2025-08-08T22:15:46.000Z
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