check before: 2025-09-01
Product:
Copilot, Defender, Microsoft 365 Copilot
Platform:
Android, Developer, iOS, Linux, Mac, Online, Web, Windows Desktop, World tenant
Status:
Launched
Change type:
New feature, User impact, Admin impact
Links:
Details:
Summary:
Microsoft 365 Copilot will support delegate mailbox access starting late September 2025, allowing users with delegate permissions to use Copilot on those emails across multiple platforms. No permission changes are needed, the feature is on by default, and admin policies remain unchanged.
Details:
[Introduction:]
We're introducing support for Microsoft 365 Copilot in delegated mailboxes. This update enables users with delegate access to use M365 Copilot to reason over emails in those mailboxes, improving productivity and collaboration in shared scenarios. To use this feature, users must have a Microsoft 365 Copilot license.
This message is associated with Microsoft 365 Roadmap ID 416062.
[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**
User Privacy Concerns
Delegates will have access to reason over emails in the delegated mailbox, which may lead to unintended exposure of sensitive information if users are not aware of this capability.
- roles: End Users, IT Support Staff
- 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=416062
Increased Helpdesk Queries
The introduction of Copilot in delegated mailboxes may lead to an increase in helpdesk queries as users seek clarification on how delegate access works and the implications of using Copilot.
- roles: Helpdesk Staff, End Users
- 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=416062
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
