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VulnerabilityPublished

Microsoft fixes bug that removed Copilot buttons in Outlook

Source Bleeping Computer

0
Severity
Medium

Rated by Threat Radar

Data as of 3 Jul 2026, 01:20 UTC

What to do

AI-suggested

Microsoft has implemented a service-side fix as of June 29, 2026. Users should restart their Outlook client to apply the fix immediately and update to the latest build via File > Office Account > Update Options > Update Now. Users unable to upgrade can revert to the previous Current Channel build (16.0.20026.20168) or use Outlook Web Access or the new Outlook client as a workaround. No additional security actions are required. For the separate Outlook crash issue related to Kaspersky Antivirus, affected users should check application logs for specific fault events and contact Kaspersky support.

Description

Microsoft 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. [...]

References

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