Outlook (Microsoft 365) (formerly Office 365)
Office 365 is now Outlook (Microsoft 365). Run it as a desktop app inside Franz.
What happened to Office 365?
Office 365 became Microsoft 365, and the web app you knew as Outlook on the Web is now simply Outlook. The product is the same email, calendar, and contacts suite, with the same sign-in and the same inbox. Only the name on the door changed. In Franz you run it as a focused desktop app, signed in alongside every other service you use.