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

Vendor: Microsoft
Product: Microsoft Teams
Type: Availability
Announcement date: 2025-08-26
Effective date: Date not published
Impact: Affected

In brief

What the source says

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. GA date: September CY2025 Launched General Availability Targeted Release Worldwide (Standard Multi-Tenant) Microsoft Teams Android Desktop iOS Mac Web

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Who is affected: The audience described by the Microsoft update is represented by: Microsoft Teams: Control External Access by Domain for Specific Users and Groups 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 appro

Why it matters: The change matters because the official source describes: Microsoft Teams: Control External Access by Domain for Specific Users and Groups 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 appro

Urgency: Monitor

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Raw capture
2026-08-29T09:22:49.319599+00:00
Event
Microsoft Teams: Control External Access by Domain for Specific Users and Groups 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. GA date: September CY2025 Launched General Availability Targeted Release Worldwide (Standard Multi-Tenant) Microsoft Teams Android Desktop iOS Mac Web
source
Product Microsoft Teams
Microsoft Teams: Control External Access by Domain for Specific Users and Groups 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. GA date: September CY2025 Launched General Availability Targeted Release Worldwide (Standard Multi-Tenant) Microsoft Teams Android Desktop iOS Mac Web
source
Insight a salesperson
Microsoft Teams: Control External Access by Domain for Specific Users and Groups 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. GA date: September CY2025 Launched General Availability Targeted Release Worldwide (Standard Multi-Tenant) Microsoft Teams Android Desktop iOS Mac Web
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