Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Ok so I downloaded your version and installed it. And indeed after the product has downloaded and installed it asks you to either sign-in, create an account OR...yes drum-roll...wait for it...."I Don't want to sign in or create an account" and when you click on that it asks you to enter an Office 2016 product key...now of course that is technically only obtainable by creating an account anyway...so I am not sure this is the answer gents..I have a 2016 retail pack on a shelf - gonna go find it and see what happens
EDIT: Ok so I stuck the Product Key (on the card in the retail pack) into the dialogue box - but hit the next problem - "This product key has already been used. Please sign in with the active Office account that you used with this product key before, or enter a new product key here." - and this is a new sealed pack - the second of two. When I tried the first one some months back, I got this same message and shelved the whole stinking MS Office affair (and THAT issue is another whole mile-long thread on its own). What I have to try next of course is to call them on the activation line...joy and fun!