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MC1133508 — Microsoft Teams Integration with Microsoft Defender for Office Tenant Allow/Block List for blocking domains

MC1133508Microsoft Teams · Microsoft Defender XDRstayInformedUpdated: 16 December 2025

Microsoft Teams now integrates with Microsoft Defender for Office 365 Tenant Allow/Block List, enabling security admins to centrally manage blocked external domains in Teams. This feature, available with Defender Plan 1 or 2, blocks communications from specified domains, supports audit logging, and requires Teams admin enabling.

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Applies to: Microsoft Teams · Microsoft Defender XDR
Source: mc.merill.net — data via Merill Fernando's open archive (MIT).