Select Sign into an existing Office 365 Subscription To activate Office, sign in with your WUSTL accountĨ. pkg file from the folder it was downloaded to and follow the steps to install Officeħ. Determine the appropriate location for the download and SaveĦ. Select Install Office and then Office 365 appsĥ. Select the App Launcher on the top leftĤ. Log in to Office 365 using your WUSTL Key at /mailĢ. To install free Microsoft Office apps for Mac OS through your Office 365 account:ġ. Once you depart the University, your Office installation will need to be re-activated using a personal account or personal license key. NOTE: Microsoft Office apps installed through your Office 365 account will remain active as long as you remain a current student or employee. WUIT Project Management Practice Development.Shared IT Services (SITS) Migration Information.