check before: 2026-04-01
Product:
Copilot, Copilot Chat, Microsoft 365 Apps, Microsoft 365 Copilot, Outlook, Windows
Platform:
Android, iOS, Mac, Online, Web, World tenant
Status:
Rolling out
Change type:
New feature, Updated message, User impact
Links:
Details:
Summary:
Microsoft is expanding Copilot Chat in Outlook to support shared and delegated mailboxes across new Outlook versions starting early April 2026. Users with Microsoft 365 Copilot licenses can use Copilot features directly in these mailboxes, improving team collaboration without extra setup or mailbox-specific prompts.
Details:
Updated May 1, 2026: We have updated the content. Thank you for your patience.
[Introduction]
This feature is rolling out to new Outlook for Windows, Outlook on the web, Outlook for Mac, and Outlook for iOS and Android. It is not yet available in classic Outlook for Windows. We'll share an update when support is added.
We are expanding Microsoft Copilot capabilities in Outlook to include shared and delegate mailboxes. This update allows users who already have access to Microsoft 365 Copilot to use Copilot features, including Copilot Chat, directly while working in shared or delegated mailboxes. This change is designed to improve productivity for teams that collaborate using shared inboxes such as executive assistants, support desks, HR, and finance teams.
This message is associated with Microsoft 365 Roadmap ID 554936.
[When this will happen:]
Targeted Release: We will begin rolling out early April 2026 and expect to complete by early May 2026.
General Availability: We will begin rolling out early May 2026 and expect to complete by early June 2026.
Change Category:
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Scope:
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Release Phase:
General Availability, Targeted Release
Created:
2026-03-17
updated:
2026-05-02
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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summary for non-techies**
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Direct effects for Operations**
User Experience Improvement
Users can access Copilot Chat directly in shared mailboxes, enhancing collaboration and productivity without needing to switch mailboxes.
- roles: Executive Assistants, Support Desk Staff
- references: https://www.microsoft.com/microsoft-365/roadmap?filters=&searchterms=554936
Training and Documentation Needs
Internal documentation and training materials must be updated to reflect the new capabilities of Copilot in shared mailboxes, which may lead to temporary confusion among users.
- roles: IT Trainers, HR Personnel
- references: https://www.microsoft.com/microsoft-365/roadmap?filters=&searchterms=554936
Permission Model Review
Organizations need to review shared and delegated mailbox permission models to ensure they align with expectations, which may cause delays in access for some users.
- roles: IT Administrators, Compliance Officers
- references: https://www.microsoft.com/microsoft-365/roadmap?filters=&searchterms=554936
Data Privacy Concerns
Copilot conversation history is saved to the user's primary account, which may raise concerns about data privacy and sharing among users accessing the same shared mailbox.
- roles: Data Protection Officers, Legal Advisors
- references: https://www.microsoft.com/microsoft-365/roadmap?filters=&searchterms=554936
Increased Support Requests
The introduction of new features may lead to an increase in support requests as users adapt to the changes, potentially overwhelming IT support teams.
- roles: IT Support Staff, Help Desk Technicians
- references: https://www.microsoft.com/microsoft-365/roadmap?filters=&searchterms=554936
Configutation Options**
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Opportunities**
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Potentional Risks**
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Data Protection**
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IT Security**
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Hypothetical Work Council Statement**
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DPIA Draft**
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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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change history
| Date | Property | old | new |
| 2026-05-02 | MC Messages | Updated April 21, 2026: We have updated the content. Thank you for your patience.
[Introduction] This feature is rolling out to new Outlook for Windows, Outlook on the web, and Outlook for iOS and Android. It is not yet available in classic Outlook for Windows. We'll share an update when support is added. We are expanding Microsoft Copilot capabilities in Outlook to include shared and delegate mailboxes. This update allows users who already have access to Microsoft 365 Copilot to use Copilot features, including Copilot Chat, directly while working in shared or delegated mailboxes. This change is designed to improve productivity for teams that collaborate using shared inboxes such as executive assistants, support desks, HR, and finance teams. This message is associated with Microsoft 365 Roadmap ID 554936. [When this will happen:] Targeted Release: We will begin rolling out early April 2026 and expect to complete by early May 2026. General Availability: We will begin rolling out early May 2026 and expect to complete by early June 2026. | Updated May 1, 2026: We have updated the content. Thank you for your patience.
[Introduction] This feature is rolling out to new Outlook for Windows, Outlook on the web, Outlook for Mac, and Outlook for iOS and Android. It is not yet available in classic Outlook for Windows. We'll share an update when support is added. We are expanding Microsoft Copilot capabilities in Outlook to include shared and delegate mailboxes. This update allows users who already have access to Microsoft 365 Copilot to use Copilot features, including Copilot Chat, directly while working in shared or delegated mailboxes. This change is designed to improve productivity for teams that collaborate using shared inboxes such as executive assistants, support desks, HR, and finance teams. This message is associated with Microsoft 365 Roadmap ID 554936. [When this will happen:] Targeted Release: We will begin rolling out early April 2026 and expect to complete by early May 2026. General Availability: We will begin rolling out early May 2026 and expect to complete by early June 2026. |
| 2026-05-02 | MC Last Updated | 04/21/2026 23:44:58 | 2026-05-01T18:39:11Z |
| 2026-05-02 | MC Summary | Microsoft Outlook is expanding Microsoft 365 Copilot to support Copilot Chat and features like Summarize and Draft in shared and delegated mailboxes across new Outlook apps, rolling out from April to June 2026. Conversation history stays with the user’s primary account, and no action is needed to enable this feature. | Microsoft is expanding Copilot Chat in Outlook to support shared and delegated mailboxes across new Outlook versions starting early April 2026. Users with Microsoft 365 Copilot licenses can use Copilot features directly in these mailboxes, improving team collaboration without extra setup or mailbox-specific prompts. |
| 2026-04-22 | MC Messages | [Introduction]
We are expanding Microsoft Copilot capabilities in Outlook to include shared and delegate mailboxes. This update allows users who already have access to Microsoft 365 Copilot to use Copilot features, including Copilot Chat, directly while working in shared or delegated mailboxes. This change is designed to improve productivity for teams that collaborate using shared inboxes such as executive assistants, support desks, HR, and finance teams. This message is associated with Microsoft 365 Roadmap ID 554936. [When this will happen:] Targeted Release: We will begin rolling out early April 2026 and expect to complete by early May 2026. General Availability: We will begin rolling out early May 2026 and expect to complete by early June 2026. | Updated April 21, 2026: We have updated the content. Thank you for your patience.
[Introduction] This feature is rolling out to new Outlook for Windows, Outlook on the web, and Outlook for iOS and Android. It is not yet available in classic Outlook for Windows. We'll share an update when support is added. We are expanding Microsoft Copilot capabilities in Outlook to include shared and delegate mailboxes. This update allows users who already have access to Microsoft 365 Copilot to use Copilot features, including Copilot Chat, directly while working in shared or delegated mailboxes. This change is designed to improve productivity for teams that collaborate using shared inboxes such as executive assistants, support desks, HR, and finance teams. This message is associated with Microsoft 365 Roadmap ID 554936. [When this will happen:] Targeted Release: We will begin rolling out early April 2026 and expect to complete by early May 2026. General Availability: We will begin rolling out early May 2026 and expect to complete by early June 2026. |
| 2026-04-22 | MC Title | Microsoft Outlook: Copilot Chat available in shared and delegate mailboxes | (Updated) Microsoft Outlook: Copilot Chat available in shared and delegate mailboxes |
| 2026-04-22 | MC Last Updated | 03/06/2026 23:51:50 | 2026-04-21T23:44:58Z |
| 2026-04-22 | MC MessageTagNames | New feature, User impact | Updated message, New feature, User impact |
| 2026-04-22 | MC Summary | Microsoft 365 Copilot, including Copilot Chat, will be available in Outlook shared and delegate mailboxes starting April 2026. Users with access and licenses can use Copilot features directly in these mailboxes without special prompts. Conversation history stays with the user's primary account. No action required. | Microsoft Outlook is expanding Microsoft 365 Copilot to support Copilot Chat and features like Summarize and Draft in shared and delegated mailboxes across new Outlook apps, rolling out from April to June 2026. Conversation history stays with the user’s primary account, and no action is needed to enable this feature. |
Last updated 1 month ago ago
