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  "description": "Microsoft is adding a Copilot account switcher in the new Outlook for Windows side pane, allowing users with multiple Copilot-enabled accounts to switch accounts within supported experiences. Rollout starts late April 2026, with no impact on single-account users and no required action.",
  "path": "/m365-message-center/message/mc1290822/",
  "publishedAt": "2026-04-25T00:00:05.000Z",
  "site": "https://blog.tophhie.cloud",
  "tags": [
    "559991"
  ],
  "textContent": "**[Introduction]**\n\nMicrosoft is introducing a **Copilot account switcher** in the Copilot side pane in the _new Outlook for Windows_. The account switcher shows the active Copilot‑enabled account and allows users to change the Copilot account used in the side pane in supported experiences.\n\nThis message is associated with **Microsoft 365 Roadmap ID** 559991.\n\n**[When this will happen]**\n\n  * **Targeted Release:** Rollout will begin in**late April 2026** and is expected to complete by **mid-May 2026**.\n  * **General Availability (Worldwide):** Rollout will begin in **mid-May 2026** and is expected to complete by **mid-June 2026**.\n\n\n\n**[How this affects your organization]**\n\n_Who is affected_\n\n  * Users in Microsoft 365 tenants using the **new Outlook for Windows**\n  * Only users with **multiple Copilot-enabled accounts** configured in _Outlook_\n\n\n\n _What will happen_\n\n  * Users will see a **new account selector** at the top of the _**Copilot side pane**_ in _supported experiences_.\n  * The selector shows the currently active Copilot-enabled account.\n  * The account selector appears only when multiple Copilot-enabled accounts are available and the account context may be ambiguous (for example, certain Calendar experiences).\n  * Users will be able to switch Copilot accounts within the Copilot side pane without changing Outlook’s broader account context.\n  * If you are using Mail, you will not see the Copilot account switcher.\n  * There is **no impact for users with a single Copilot-enabled account**.\n  * The feature is **enabled by default** and respects existing Copilot availability and licensing.\n  * The Copilot account switcher is **available to users with Microsoft 365 Copilot (Premium) and Copilot Chat (Basic)**.\n  * This is a multi-account feature and **requires at least two Copilot-enabled accounts** , in any combination of Premium and/or Basic.\n\n\n\n**[What you can do to prepare]**\n\nNo action is required.\n\nTo prepare for user questions, we recommend that administrators:\n\n  * Update internal documentation for Copilot usage in _multi-account scenarios_.\n  * Inform users who work across multiple accounts how to confirm or change the active Copilot account in the _Copilot side pane_.\n  * Update helpdesk guidance for users who have multiple Outlook accounts configured.\n\n\n\n**[Compliance considerations]**\n\nNo compliance considerations identified. Review as appropriate for your organization.",
  "title": "MC1290822: Microsoft Outlook: Copilot account switcher in the Outlook side pane",
  "updatedAt": "2026-04-25T00:00:05.827Z"
}