Again in December final 12 months, 2024, Microsoft introduced through the Microsoft 365 admin heart that Enterprise customers could be converted to the New Outlook for Home windows from Basic Outlook in April of 2026.

On the time, the corporate additionally knowledgeable through a assist article that Marketing strategy customers operating the Present Channel would even be steadily made to modify over to the New Outlook. Within the article, Microsoft acknowledged:

Beginning January 2025 and over the next months, in case you are a traditional Outlook person on the Present Channel with a Marketing strategy, you’ll routinely be switched to the brand new Outlook after receiving a collection of in-app notifications. You may select to modify again to traditional Outlook at any time, utilizing the toggle in new Outlook. Each customers and IT Admins can even flip off the automated swap if not able to attempt the brand new Outlook.

We are going to begin to roll out to customers with a Enterprise Plan within the Beta Channel in November 2024 for validation and suggestions.

Extra readability was offered later because it wrote:

Beginning in January 2025, customers with Microsoft 365 Enterprise Customary and Premium licenses are routinely migrated from the traditional Outlook for Home windows to new Outlook for Home windows. Customers obtain in-app notifications earlier than the migration and may decide out of the automated migration by Outlook Choices > Common. Customers who’re switched to the brand new Outlook can toggle again to the traditional Outlook in the event that they select.

Following that, just lately, Microsoft made a change to the deployment steerage for New Outlook for Home windows. Neowin seen whereas looking that the tech big has begun together with the New Outlook app by default on new Microsoft 365 (M365) deployments, though it’s giving admins the choice to incorporate each New and Basic Outlooks, or simply one in every of them.

Microsoft explains:

Set up new Outlook with a brand new Microsoft 365 deployment

Beginning with Model 2502, new deployments of Microsoft 365 desktop consumer apps on Home windows gadgets will embody the brand new Outlook app by default. Admins may select to exclude traditional or new Outlook, or to have each put in side-by-side.

To assist customers with a gradual migration to new Outlook and keep away from the disruption abrupt adjustments may trigger in a while, organizations are inspired to run traditional and new Outlook side-by-side. For that reason, each Outlooks are turned on to put in by default. Nevertheless, if a company chooses to put in both new Outlook or traditional Outlook solely, admins can change the default habits by configuring the set up setting off or on.

If you’re questioning, model 2502 of Microsoft 365 Apps was launched on the present channel earlier this month on March 5, and the dimensions of the replace was round 60 MB. The most recent construct out there for model 2502 is 18526.20168.