You can verify how many licensed machines are in use under your account, as well as deactivate a machine, by logging in to the Office 365 Software settings page. You will be required to sign in with your full UO email address and password.If you are upgrading from another version of Office, it is recommended that you uninstall the older version of Microsoft Office first.This page provides instructions for using Office 365 to install the Microsoft Office applications on the following platforms: Microsoft Office 365 refers to a group of software applications and services, including the Microsoft Office suite.