Microsoft released Office 2019 for Mac on September 24th, 2018 (Version 16.17). These instructions are for customers who have purchased a one-time version or volume license version of Office for Mac, not Microsoft 365 customers. However, if you have upgraded to Office 2021 for Mac from Office 2016 for Mac and need to go back to Office 2016 for Mac, the steps are the same as below. Office 2021 for Mac is a continuation of the same code base that Office 2019 for Mac ran under, so there is no benefit to be had by going back to Office 2019 for Mac once you have upgraded to Office 2021 for Mac from there.
