this is real


please note :
for those who already installed office in mac from the mac app store before, please uninstall and download from Microsoft.
One-time Office licenses (also known as perpetual), such as Office 2019 Home & Business, Office 2019 Home & Student, Office 2016 Home & Business, Office 2016 Home & Student, and Volume License are not compatible with Office apps downloaded from the Mac App Store. These licenses can only be used with Office apps downloaded directly from Microsoft.
If a one-time Office license is used with an app from the Mac App Store, you will see a yellow message bar stating
Action Required: We've detected a one-time purchase license and the app will be in reduced functionality mode.
If you have a perpetual (one-time) license but have inadvertently downloaded Office apps from the Mac App Store, you can follow these steps to install the right apps.
So thank you
@hexor for sharing this very valuable giveaway.