Princeton University faculty, staff and students can install Office 365 ProPlus on their macOS or Windows computers, tablets and smartphones. Microsoft is making the Office suite available to higher education at no charge. You can download and install the latest, full-version of MS Office 365 ProPlus on up to five of your personal devices (computers, tablets or phones) with Windows, MacOS iOS or Android operating systems.
Go to https://portal.microsoftonline.com and sign into the Princeton Federation Services with your Princeton University email address (as in your NetID@princeton.edu) and your University password. Note: You may be asked to chose which account to use. If asked select "Work or school account created by your IT department"
Office Suite: Answers to Frequently Asked Questions (FAQ)
https://princeton.service-now.com/service?id=kb_article&sys_id=612a27064f9ca20018ddd48e5210c725
Office 365: Installation Instructions for Personally Owned macOS Computers
https://princeton.service-now.com/service?sys_id=1193&id=kb_article
Office 365: Installation instructions for Windows computers
https://princeton.service-now.com/service?sys_id=1192&id=kb_article