Microsoft 365 Copilot: Use Copilot in Outlook to manage your inbox - available in Frontier Public

Microsoft 365 Copilot in Outlook (Frontier Public) enables users to manage inbox tasks like drafting emails and creating rules via chat prompts. Rolling out April 27-28, 2026, it supports multiple Outlook clients (excluding EU users) with no admin action needed. It processes mailbox content respecting permissions.

[Introduction]

Microsoft 365 Copilot in Outlook can now take action directly in your inbox by generating draft emails, creating and managing rules, as well as supporting many more triage actions.

[What’s Changing]

Opening Copilot Chat in Outlook will enable Copilot to take actions in the user’s inbox default (Frontier only). Users can choose to toggle back to the chat-only Copilot experience via the "default mode" dropdown just above the prompt box.

[When will this happen]

• Frontier Public: Rollout begins April 27, 2026
• Rollout completion: Expected by April 28, 2026

Outlook may need to be restarted for the change to take effect.

[How this affects your organization]

Who is affected

• Users in M365 tenants enabled for Frontier Public with Microsoft 365 Copilot licenses

What will happen

• Users can perform supported inbox actions by prompting Copilot in chat.
• Copilot in Outlook goes beyond chat-based assistance, moving from summarizing and editing messages to actively managing your inbox. It can take on multi-step work, drafting messages, creating and managing rules and triaging emails.
• Some of these actions are already available in existing Copilot experiences.
• The new default experience expands how these capabilities can be accessed conversationally and enables additional supported triage tasks through the Copilot Chat interface.
• The feature appears as service and client updates become available; no user migration is required.

Supported clients:

• Outlook on the Web
• Classic Outlook for Windows
• Outlook for Windows
• Outlook for iOS
• Outlook for Android

Other Outlook clients are not included in this rollout.

The new default experience is not currently available to users in the EU.

[What you can do to prepare]

• No admin action is required to enable this feature for Frontier Public.
• Review Copilot and Outlook usage guidance with helpdesk and support teams.
• Consider notifying users that additional inbox actions may appear in Copilot Chat during the preview period.
• Update internal documentation if you provide guidance on Outlook or Copilot usage.

Learn more: Frontier program - Microsoft adoption

Support article.Use Microsoft 365 Copilot in Outlook to manage your inbox (Frontier) - Microsoft Support

[Compliance considerations]

Question	Answer
Does the change alter how existing customer data is processed, stored, or accessed (for example, emails, documents, chats)?	Yes. Copilot processes existing mailbox content to interpret user prompts and execute requested inbox actions. All access respects existing user permissions and Outlook policies.
Does the change introduce or significantly modify AI/ML or agent capabilities that interact with or provide access to customer data?	Yes. This update expands generative AI interaction by enabling conversational invocation of mailbox management actions through Copilot Chat.
Does the change provide end users any new way of interacting with generative AI, if so how?	Yes. Users can manage inbox actions using natural language prompts within Copilot Chat across supported Outlook clients.