GoKawiilMicrosoft says it's still investigating a known issue that causes the Copilot and Copilot Chat buttons in Classic Outlook to disappear for some Windows users.
As it acknowledged when it announced a fix via a service change in June, this affects only customers with the Copilot Chat (Basic) license or a paid M365 Copilot (Premium) account who may no longer see the Copilot buttons in the side navigation and above the ribbon.
According to Microsoft, affected users 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.
However, in a recent update, Microsoft said it's still investigating the issue and confirmed it happens after upgrading classic Outlook for Windows to build 20026.20182 and higher.
"The Outlook Team is actively investigating this issue. Current analysis indicates that, in affected environments, Outlook is unable to locate the MAPI property PR_PROFILE_USER_SMTP_EMAIL_ADDRESS_W within the null profile section," Microsoft said.
... continue reading