Microsoft Teams: Control External Access by Domain for Specific Users and Groups

Originally posted by Microsoft Aug 27, 2025 Uncategorized 0 Comments

Gain granular control over external communication. By setting custom External Access policies, you can define domain allow/deny lists and assign them to specific users or groups – capabilities that were previously tenant-wide only (“Teams and Skype for Business users in external organizations”). Use this to pilot with a department, restrict high‑risk roles to approved partners, or open federation broadly where appropriate. Example: Allow Group A to communicate only with a specific domain, while Group B can communicate with all external domains.

Product Microsoft Teams
Release phase Targeted Release
Release date September CY2025
Platform Web
Cloud Instance Worldwide (Standard Multi-Tenant)
Created 2025-08-26
Roadmap ID 501275
Roadmap Link https://www.microsoft.com/microsoft-365/roadmap?id=501275

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Joao Ferreira

I've been working with Microsoft Technologies over the last ten years, mainly focused on creating collaboration and productivity solutions that drive the adoption of Microsoft Modern Workplace.

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