To enable automatic updates, open any Office app, such as Word ... signed in with the correct Microsoft account associated ...

The latter option is for installing Microsoft Word, Excel, PowerPoint ... Similarly, you need to have a valid product key if you want to use Office 2021, Office 2019, or any other version.

If you want to download Microsoft Word, Excel, and PowerPoint on Mac ... After completing the download, you need to enter the product key in order to continue using those apps without any ...