How to Cancel Microsoft Office 365
Navigate to the website and login.
Click on Manage Account. You will be taken to Payment and Billing.
Click on Cancel Subscription under Microsoft Office 365.
Also, on Services and Subscriptions, disable auto-renew option by clicking on Turn off Auto-Renew.
Note: If you are using the 30-day trial version, you will be asked “Are you sure?” Click on the button “Confirm Cancellation”.