copilot stopped working in outlook

Use the following steps to restore Copilot in Outlook:

1. Confirm the correct account and license
   • In Outlook, go to File > Account.
   • Check that the primary account shown is the one that has a Copilot license (for home users: Microsoft 365 Personal/Family or Copilot Pro; for business users: Microsoft 365 Business Basic/Standard/Premium, E3, E5, F1, or F3 plus Microsoft 365 Copilot).
   • If signed in with multiple accounts (for example, both personal and work/school), sign out the non‑Copilot account or switch the primary account to the one with Copilot.
2. Refresh the Copilot license
   • In any Microsoft 365 app (including Outlook), go to File > Account.
   • Select Update License.
   • Close Outlook and all other Microsoft 365 apps, then reopen Outlook and try Copilot again.
3. Check for known license validation issues (web Outlook)
   • If using Outlook on the web and Copilot just says “try again,” refresh the browser page.
   • Ensure third‑party cookies are enabled; blocking them can prevent Copilot from validating the license. For more details, see the note under Web in the Copilot button article and the license‑validation article.
4. Verify network and update status
   • Make sure the device has internet connectivity that meets the network requirements mentioned in the troubleshooting article.
   • Install the latest Office updates, then restart Outlook.
5. If Copilot is still missing or failing
   • Follow the steps in How to find and enable missing Copilot button in Microsoft 365 apps to ensure Copilot is enabled and the app is on a supported build.
   • If managed by an organization, ask the Microsoft 365 admin to confirm that:
     • A Copilot‑supported license is assigned.
     • Copilot is not blocked by organizational policies or privacy settings.

If the problem persists after these steps, contact Microsoft support, as the issue may be a known product issue being actively worked on.

References:

• Copilot is missing, disabled, or doesn't work correctly
• How to find and enable missing Copilot button in Microsoft 365 apps
• I am getting license validation errors with Copilot