This has been a huge PITA for me since I often need Word and Excel on a computer that's restricted from accessing the internet.
[0]: https://support.office.com/en-us/article/Use-the-Office-2016...
> You need to be connected to the internet to download this installer file, but once that's done, you can then install Office offline on a PC at your convenience.
> ...
> After your Office installation is complete, you need to activate Office. Be sure you're connected to the Internet and then open any Office application, such as Word or Excel.
I mean the lede is "problems with slow speed or unreliable connections" but at the same time ... offline is offline.
I assume they just have decided to make this functionality a special case for enterprises of a certain size. I emphasized to them this could be bought through a business channel if needed but I assume I have not the right scale.