Microsoft has started to include the New Outlook for Windows app on new Microsoft 365 deployments by default.
Back in December last year, 2024, Microsoft announced via the Microsoft 365 admin center that Enterprise users would be switched over to the New Outlook for Windows from Classic Outlook in April of 2026.
At the time, the company also informed via a support article that Business plan users running the Current Channel would also be gradually made to switch over to the New Outlook. In the article, Microsoft stated:
Starting January 2025 and over the following months, if you are a classic Outlook user on the Current Channel with a Business plan, you will automatically be switched to the new Outlook after receiving a series of in-app notifications. You can choose to switch back to classic Outlook at any time, using the toggle in new Outlook. Both users and IT Admins can also turn off the automatic switch if not ready to try the new Outlook.
