Note: *Some versions of Office don't have an associated Microsoft account, or work or school account, or you may need to redeem your product key in a different way. For Office Professional Plus 2019, Office Standard 2019, or a stand-alone app such as Word 2019 or Project 2019 the steps to install Office depend if you got Office through the following: Microsoft HUP: You bought Office for personal use through your company and have a product key, see. Volume license versions: IT departments might use a different method to install Office for their organization. Talk to your IT department for install help. Third-party seller: You bought Office from a third-party and you're. Note: If you want to install a 32-bit or 64-bit version of Office, but this is different from what you previously installed, you need to first.