Microsoft has fixed a known issue that caused Copilot Chat and Copilot buttons to disappear in Classic Outlook for Windows users with the Copilot Chat (Basic) license. The company is also investigating Outlook crashes linked to Kaspersky Antivirus and the Kaspersky Mail Checker module, mcou.dll. #ClassicOutlook #CopilotChat #KasperskyAntivirus #mcou.dll
Keypoints
- Microsoft fixed a service issue affecting Copilot buttons in Classic Outlook for Windows.
- Users with the Copilot Chat (Basic) license may not see Copilot in the ribbon or side navigation.
- Restarting Outlook can apply the service change immediately.
- Updating to the latest build or using OWA or new Outlook are recommended workarounds.
- Microsoft is investigating Outlook crashes tied to Kaspersky Antivirus and mcou.dll.