Scheduling and managing events using Outlook.com calendar
Hey dude, I figured out a way out of this. Go to help>Support and type the issue, something along the lines of "How do I switch back to the old outlook?".
The bot will suggest the answers to toggle off the switch that doesn't exist with the new update, however, if you scroll down, it has a "Do it for me" option, click that and voila! Back to the old one.
Hope that helps!!