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Microsoft Resolves Copilot Button Issue in Classic Outlook

Microsoft Resolves Copilot Button Issue in Classic Outlook

First seen 19 Oct 2026, 13:49 UTC • •
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ThreatCluster AI
ThreatCluster •October 19, 2026 at 22:21 UTC
  • •Microsoft fixed a bug causing Copilot buttons to disappear in classic Outlook.
  • •Affected users had either a Copilot Chat (Basic) or Microsoft 365 Copilot (Premium) license.
  • •Temporary workarounds include adjusting settings or using Outlook on the web.

Microsoft has fixed a bug that caused the Copilot Chat and Copilot buttons to disappear for some users of the classic Outlook desktop mail client. This issue affected users with either a Copilot Chat (Basic) license or a Microsoft 365 Copilot (Premium) account. The problem arose after updates to Outlook that prevented it from retrieving necessary account information from user profiles. Although the Copilot features remained accessible via other platforms like Outlook on the web, the missing buttons in the classic client caused significant user confusion. Microsoft has provided a temporary workaround while confirming that the issue has now been resolved. Users are encouraged to check their settings or create a new Outlook profile if they continue to experience problems.

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Timeline

2026-10-19
Microsoft announces bug fix
Microsoft confirmed the resolution of the issue affecting Copilot buttons in classic Outlook for Windows users.
BleepingComputer
2026-10-19
Workaround provided
Microsoft shared a temporary workaround for users still facing issues with missing Copilot buttons.
BleepingComputer

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Common questions

Who is affected by this issue?
Users of the classic Outlook desktop mail client with Copilot Chat (Basic) or Microsoft 365 Copilot (Premium) licenses.
What should I do if the buttons are still missing?
Check your Outlook settings for the 'Show Apps in Outlook' option or consider creating a new Outlook profile.
Is there any risk associated with this bug?
No, the issue was related to user interface elements and did not expose any security vulnerabilities.