Microsoft fixes classic Outlook bug that hid Copilot buttons

Microsoft has fixed a known issue that removed the Copilot Chat and Copilot buttons in the classic Outlook desktop mail client for some Windows users.

As explained in an updated support document, affected users with the Copilot Chat (Basic) license or a Microsoft 365 Copilot (Premium) account no longer saw Copilot buttons in the side navigation and above the ribbon.

Those impacted by this experienced one or more of the following issues:

Microsoft first announced in June that it had fixed the bug with a service change, but last month it said it had started investigating again after recent updates caused it to resurface.

Now, Microsoft says it has finally resolved this classic Outlook issue, blaming it on a bug that prevented Outlook from retrieving some account information from the user's Outlook profile.