![(Updated) Microsoft Teams Integration with Microsoft Defender for Office Tenant Allow/Block List for blocking domains [MC1133508]](https://mwpro.co.uk/wp-content/uploads/2024/08/pexels-timmossholder-1154739-1024x683.webp "(Updated) Microsoft Teams Integration with Microsoft Defender for Office Tenant Allow/Block List for blocking domains [MC1133508] 1")
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(Updated) Microsoft Teams Integration with Microsoft Defender for Office Tenant Allow/Block List for blocking domains [MC1133508]
Message ID: MC1133508 (Updated) Updated December 16, 2025: We have updated the timeline. Thank you for your patience.Introduction We're introducing a new integration between Microsoft Teams and Microsoft Defender for Office 365 that enables security admins to manage blocked external…
![(Updated) Microsoft Teams Integration with Microsoft Defender for Office Tenant Allow/Block List for blocking domains [MC1133508]](https://mwpro.co.uk/wp-content/uploads/2024/08/pexels-pixabay-415574-1024x683.webp "(Updated) Microsoft Teams Integration with Microsoft Defender for Office Tenant Allow/Block List for blocking domains [MC1133508] 2")
![(Updated) Microsoft Teams Integration with Microsoft Defender for Office Tenant Allow/Block List for blocking domains [MC1133508]](https://mwpro.co.uk/wp-content/uploads/2025/06/pexels-googledeepmind-17486101-1024x683.webp "(Updated) Microsoft Teams Integration with Microsoft Defender for Office Tenant Allow/Block List for blocking domains [MC1133508] 3")
![Microsoft Teams Integration with Microsoft Defender for Office Tenant Allow/Block List for blocking domains [MC1133508]](https://mwpro.co.uk/wp-content/uploads/2024/08/pexels-michael-pointner-134459625-25381383-1024x683.webp "Microsoft Teams Integration with Microsoft Defender for Office Tenant Allow/Block List for blocking domains [MC1133508] 4")