When you start a new email, a notice in the body tells you to press Alt+I to draft with Copilot. Triggering that key combination displays a prompt in which you can describe the type of email you want ...

After disabling Copilot in any of the other Outlook apps, allow time for the change to sync. Open classic Outlook. The Copilot button should no longer appear, while the Draft with Copilot option won't ...