These days, with the advent of the entirely legal "recycled license market" coming out of the EU, I'd recommend buying the real thing for a song.

I've now upgraded at least 6 machines with Office 2016 Pro Plus for $10 US or less per machine using recycled licenses.

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Brian - Windows 10 Home, 64-Bit, Version 1809, Build 17763  

A great deal of intelligence can be invested in ignorance when the need for illusion is deep.

          ~ Saul Bellow, To Jerusalem and Back