Archive of messages posted in the Message Center of the Microsoft 365 Admin Portal.| mc.merill.net
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, rolling out from August to October 2025, allows blocking communications, deleting existing messages, and auditing actions, with admin controls managed via Teams and Entra ID.| mc.merill.net