MC1411435 – M365 Change Digest

One-line summary

Microsoft 365 Copilot introduces Domain Exclusion, allowing admins to exclude specific domains from web grounding to better align Copilot responses with organizational policies.

Similar updates

Details

RoadmapIds

503144

Summary

Microsoft 365 Copilot now offers Domain Exclusion, allowing admins to exclude up to 1,000 domains from web grounding to ensure responses align with organizational policies. Available worldwide from mid-July 2026, this feature requires admin configuration and affects Copilot web grounding scenarios.

Platforms

Desktop, Web

Body (from Message Center)

[What and why]

Microsoft is introducing Domain Exclusion for Microsoft 365 Copilot, now generally available. This feature enables administrators to exclude specific domains from web grounding so that Copilot responses align with organizational policies and trusted sources. This capability gives admins greater control over how external web content is used in Copilot experiences.

This message is associated with Microsoft 365 Roadmap ID 503144.

[Rollout schedule]

General Availability (Worldwide): Beginning mid-July 2026 and expected to complete late July 2026
PowerShell script available: July 16, 2026

[Impact on your organization]

Who is affected

Microsoft 365 administrators managing Copilot configuration

Platforms and services

Microsoft 365 Copilot
Copilot Chat
Web grounding scenarios

What will happen

Admins can define up to 1,000 domains to exclude from Copilot web grounding.
Excluded domains will not be used in Copilot responses that rely on web grounding.
The feature is not enabled by default and requires admin action.
There is no change to the user experience unless configured by admins.

[Action required and recommendations]

No action is required for this feature to become available in your tenant.

Learn more: Learn documentation and PowerShell script will be available upon GA at: https://learn.microsoft.com/microsoft-365/copilot/microsoft-365-copilot-domain-exclusion

[Compliance considerations]

Question	Answer
Does the change introduce or significantly modify AI or machine learning capabilities that interact with or provide access to customer data?	Yes. Admins can configure domain exclusion to exclude up to 1,000 domains from Copilot web grounding
Does the change include an admin control and, can it be controlled through Entra ID group membership?	Yes. Administrators can configure domain exclusions using a PowerShell script.

Raw JSON (for debugging)

Expand/collapse the full payload below.

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    "ai_action_required_by": "2026-07-16T00:00:00Z",
    "ai_actions": [
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      "Refer to documentation on GA"
    ],
    "ai_master_tags": [
      "Admin",
      "Compliance",
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    ],
    "ai_model": "gpt-4.1",
    "ai_summary": "Microsoft 365 Copilot introduces Domain Exclusion, allowing admins to exclude specific domains from web grounding to better align Copilot responses with organizational policies.",
    "ai_topics": [
      "Copilot",
      "Copilot Chat"
    ],
    "category": "stayInformed",
    "details_map": {
      "Platforms": "Desktop, Web",
      "RoadmapIds": "503144",
      "Summary": "Microsoft 365 Copilot now offers Domain Exclusion, allowing admins to exclude up to 1,000 domains from web grounding to ensure responses align with organizational policies. Available worldwide from mid-July 2026, this feature requires admin configuration and affects Copilot web grounding scenarios."
    },
    "id": "MC1411435",
    "importance": 4,
    "is_major_change": false,
    "last_modified": "2026-07-01T15:24:30Z",
    "ms_products": [
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      "Copilot Chat"
    ],
    "platforms": "Desktop, Web",
    "roadmap_ids": [
      "503144"
    ],
    "services": [
      "Microsoft Copilot (Microsoft 365)",
      "Microsoft 365 Copilot Chat"
    ],
    "severity": "normal",
    "tags": [
      "New feature",
      "User impact",
      "Admin impact"
    ],
    "title": "Microsoft 365 Copilot: Domain exclusion for web grounding"
  }
}