check before: 2025-09-01
Product:
Copilot, Copilot Chat, Entra, Microsoft 365 Apps, Microsoft 365 Copilot, Teams
Platform:
Android, Developer, iOS, Linux, Mac, Online, Teams And Surface Devices, Web, Windows Desktop, World tenant
Status:
Rolling out
Change type:
New feature, User impact, Admin impact
Links:
Details:
Summary:
Microsoft 365 Copilot Chat will allow users with read access to shared mailboxes to use Copilot for email starting late September 2025. The feature is on by default, requires no permission changes, and is available across multiple platforms. Access is controlled by existing mailbox permissions.
Details:
[Introduction]
To support broader collaboration scenarios, Microsoft 365 Copilot Chat will now allow users with access to shared mailboxes to ground their conversations in the content of those mailboxes. This update reflects customer feedback requesting more inclusive access to Copilot capabilities across mailbox types.
To use this feature, users must have a Microsoft 365 Copilot license and read access to the shared mailbox.
This update is available across multiple platforms, including Android, Desktop, Developer, iOS, Linux, Mac, Teams, Surface Devices, and Web.
This message is associated with Microsoft 365 Roadmap ID 488797.
[When this will happen:]
General Availability (Worldwide): Rollout will begin in late September 2025 and is expected to complete by late September 2025.
Change Category:
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Scope:
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Release Phase:
General Availability
Created:
2025-10-01
updated:
2025-10-01
Task Type
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Docu to Check
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MS How does it affect me
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MS Preperations
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MS Urgency
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MS workload name
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linked item details
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Pictures
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summary for non-techies**
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Direct effects for Operations**
Data Privacy Concerns
With the introduction of Copilot Chat for shared mailboxes, users with access can analyze email content, potentially leading to unauthorized access to sensitive information if not properly managed.
- roles: Compliance Officer, IT Security Manager
- references: https://support.microsoft.com/topic/use-copilot-in-shared-mailboxes-and-delegate-mailboxes-3e7e5130-eabe-4c19-94ea-117b2a4c14d6, https://www.microsoft.com/microsoft-365/roadmap?filters=&searchterms=488797
User Experience Disruption
If users are not informed about the new capabilities of Copilot Chat, they may experience confusion or disruption in their workflow when others utilize the feature without their knowledge.
- roles: End User, Team Leader
- references: https://support.microsoft.com/topic/use-copilot-in-shared-mailboxes-and-delegate-mailboxes-3e7e5130-eabe-4c19-94ea-117b2a4c14d6, https://www.microsoft.com/microsoft-365/roadmap?filters=&searchterms=488797
Configutation Options**
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Data Protection**
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IT Security**
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explanation for non-techies**
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** AI generated content. This information must be reviewed before use.
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Last updated 2 weeks ago ago
