Microsoft fixes bug that removed Copilot buttons in Outlook
Summary
Microsoft fixed a bug where Copilot buttons were disappearing from Classic Outlook for Windows users with the Copilot Chat (Basic) license. The affected users could not see Copilot in various locations within the email client, though the feature remained available through other access points like Outlook on the web.
Solution / Mitigation
Microsoft addressed the issue with a service change on June 29, 2026. Users can restart their email client to get the change immediately, or update to the latest build by selecting File > Office Account > Update Options > Update Now. Those unable to upgrade can work around the issue by reverting to the previous Current Channel build (16.0.20026.20168) or using the new Outlook or Outlook Web Access (OWA, the web version of Outlook).
Classification
Affected Vendors
Related Issues
Original source: https://www.bleepingcomputer.com/news/microsoft/microsoft-fixes-bug-that-removed-copilot-button-in-outlook/
First tracked: July 2, 2026 at 02:00 PM
Classified by LLM (prompt v3) · confidence: 75%