This is not a punt.
I am selling a PC with Windows 10, Sometime ago I purchased a couple of Office 2016 Keys (off Amazon – never used). I had forgot about it (as I prefer Office 2007), I remembered today and installed Office 2016 on the PC (I am selling), it accepted the Key and activated all seems fine.
When you open Word, at the top right is a message Sgn in to get the most out of Office. All it asks is for an email to login, I am not going to login, I will leave that for the purchaser.
I recall when I once used a key I logged in with my Hotmail) email, next time I re installed on the same PC I just had to use my email to activate it.
Hope you understand, the question is.
Can I sell the PC with this Office 2016 installed.