GoKawiilMicrosoft has fixed a known issue causing the Copilot Chat or Copilot buttons in Classic Outlook to disappear for Windows users with the Copilot Chat (Basic) license.
As the company explains in a recent support document, affected users may no longer see Copilot buttons on the side navigation and above the ribbon.
Those affected may also experience one or more of the following issues:
The Copilot button is missing from the top-right area above the ribbon.
The Copilot icon is missing from the left app bar or More Apps area in classic Outlook.
In Add Apps, Copilot may appear as an available app, but selecting Open does nothing.
Adding Copilot through ribbon customization may show the command as unavailable or grayed out.
Copilot remains available from other entry points, such as Outlook on the web or the Microsoft 365 Copilot standalone app or web experience.
Microsoft says the Outlook Team has addressed this issue with a service change on June 29, 2026, and advised those who are still unable to see the Copilot buttons in Classic Outlook to restart their email client to get the change immediately.
Affected customers are also recommended to update to the latest build by selecting File > Office Account > Update Options > Update Now.
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