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Microsoft resolves bug causing Copilot buttons to disappear in Outlook

Aggregated by BrevFeed general · updated 45d ago
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Key points

  • Copilot buttons were missing for some Classic Outlook users.
  • Microsoft issued a fix on June 29, 2026.
  • Users advised to restart Outlook or update their client.

Issue Overview

Microsoft identified a bug impacting Windows users with the Copilot Chat (Basic) license in Classic Outlook. Users reported that Copilot buttons disappeared from their interface, affecting functionality in the email client.

Details of the Bug

The missing buttons included the Copilot option above the ribbon and in the side navigation. Users could see Copilot as an available app but were unable to open it due to the bug.

Resolution Steps

To resolve the issue, Microsoft implemented a service change on June 29, 2026. Affected users are advised to restart their Outlook client and ensure they are using the latest build by navigating to Update Options.

Alternative Workarounds

If users cannot update their client, they can revert to the previous version of Outlook or use Outlook on the web as alternatives. Microsoft continues to investigate related issues, including crashes when using Kaspersky Antivirus.

✨ This summary was generated by AI from the outlets' reporting listed below. It is not independently verified and may contain errors — check the original sources. How BrevFeed works →

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Reporting from

BleepingComputer — Microsoft fixes bug that removed Copilot buttons in Outlook 45d ago →

Microsoft has fixed a bug that caused Copilot buttons to be missing in Classic Outlook for Windows users. The issue affected users with a Copilot Chat (Basic) license, leading to various UI problems, which the Outlook Team addressed with a service update.