UnlikeOffice 365 or Microsoft 365, Office 2019 doesn't receive continuous updates or new features after its release. Step 1: To enter your Office product key in a newly installed MS Office, you will need to open any MS Office application and go to its File menu. MS Word file menu. Adding2019 Product Keys to my account. Hi, I purchased Office 365 family and installed it on my machine, as well as adding 3 family members. I also bought Project 2019, Visio V9NHUQ.