The new Outlook application is significantly improved with a newer interface, along with a number of other options compared to the old Outlook. However, not everyone is familiar with the new Outlook interface and wants to return to the old Outlook to fully utilize the features and more customizations on Outlook. Below are instructions for switching between old Outlook and new Outlook.
Instructions for switching between old Outlook and new Outlook
If you use old Outlook, to switch to new Outlook, users only need to Enable the New Outlook toggle button in the top right corner of the interface.
Immediately after that, the Outlook interface was switched to a new version for users to experience.
In case this New Outlook button is not available, click Help then click to return to the old Outlook interface Go to Classic Outlook that's it.
Or we can switch back to off mode at Try the New Outlook to turn off using the new version of Outlook.