Co pilot just dissappeared from classic outlook

Aaron Rumampouw 0 Reputation points
2026-09-10T23:29:26.7433333+00:00

Copilot used to be on the top right of classic outlook but all of a sudden its just gone. It's still available in OWA and PWA and i assume new outlook but its just gone in classic outlook. I've tried clearing cache and restarting it a lot of times but it just seem to have dissappeared

Outlook | Windows | Classic Outlook for Windows | For business
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  1. AI answer

    2026-09-10T23:29:40.0733333+00:00

    This matches a known issue in classic Outlook for Windows.

    After classic Outlook updates to build 20026.20182 and higher, Copilot Chat or other Copilot entry points can disappear from classic Outlook even when Copilot still works in other places such as Outlook on the web, the standalone Copilot app, or other Microsoft 365 apps. Reported symptoms include:

    1. The Copilot button missing from the top-right area above the ribbon.
    2. The Copilot icon missing from the left app bar or More Apps area.
    3. Copilot appearing in Add Apps, but Open doing nothing.
    4. Copilot commands appearing unavailable or grayed out.

    Microsoft is actively investigating this issue.

    What to do now:

    1. In classic Outlook, check the build at File > Office Account.
    2. If the build is 20026.20182 or later, the missing button is likely this known issue.
    3. Use new Outlook or Outlook on the web (OWA) as the current workaround.

    Actions that have been tried in affected cases but have not consistently restored the Copilot button:

    • Creating a new Outlook profile
    • Clearing Outlook cache and local configuration data
    • Re-signing into Office apps
    • Restarting Outlook and Windows

    Since cache clearing and restarts were already tried, that aligns with the documented behavior for this issue.

    AI-generated content may be incorrect. Read our transparency notes for more information.

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  2. Hani-Ng 1,130 Reputation points Independent Advisor
    2026-09-10T23:59:28.0066667+00:00

    Hi Aaron Rumampouw

    You can try to review AI's recommendations first, as it covers the currently known issue with Copilot disappearing from Classic Outlook and the workaround Microsoft has provided.

    For additional information related to the points mentioned in AI's answer, please refer to:

    Create a profile in classic Outlook for Windows | Microsoft Support

    How do I clear my Outlook cache? - Microsoft Q&A

    As an additional troubleshooting approach, it may also be worth checking a few environment-specific factors to rule out anything unique to the affected device or organization:

    • Outlook version and build: Verify the exact build under File > Office Account > About Outlook. This helps determine whether the issue started after a specific Outlook update.
    • Scope of impact: Check whether the issue affects only one user or multiple users in the tenant. If multiple users are experiencing the same behavior, that may point to a service, policy, or update-related issue rather than a local Outlook problem.
    • Licensing status: Confirm the user still has the appropriate Copilot license assigned and that the license is fully provisioned in Microsoft 365.
    • Microsoft 365 Apps update channel: Verify whether the device recently moved to a different update channel or received a recent Office update around the time the issue began.
    • Office policies and add-ins: If your organization uses Group Policy or Cloud Policy, review whether any recent policy changes were deployed that could affect Copilot features or connected experiences in Office applications.

    If these checks do not reveal any configuration or licensing issues, and Copilot continues to function normally in OWA, PWA, or other Microsoft 365 apps, that would further support the conclusion that the behavior is related to the Outlook-specific issue already mentioned by AI's recommendation rather than a problem with the user's account.

    In that case, the next step would be to collect the Outlook build number, confirm the scope of impact, and monitor for updates or fixes from Microsoft while using OWA or New Outlook as a temporary workaround. Please let me know the Outlook build and whether the issue affects other users in the organization. Those details may help identify whether the behavior is associated with a specific Outlook build, device configuration, or a broader environment-wide issue.

    I hope this information helpful and look forward to your response.

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