bro67 said:
The license has nothing to do with why their install failed. They just need to download the Office 2016 installer.

My guess is that they either have removed some important items off of their machine. Or are not using a legal copy of Office.

You can get away with one Desktop and one Laptop with office still.
I know i did not mean that was reason it did not install just agreeing they will possibly have trouble activating it. It did seem like missing files or corrupt copy of Office .