How to Activate MS Office 2016 on Mac?

Question

macOS

After installing ms office on a macbook and launching any ms office application, a window appears asking you to log in to your account and activate the office from your account. After logging into the account, only office 2019 licenses are displayed and no office 2016 licenses are displayed. There are 15 office 2019 licenses and 6 office 2016 licenses associated with this account. Can I manually enter the key somewhere like in Windows? Or activate in another way?
ps The picture is for an example, so that there is an understanding where exactly the licenses are not displayed.

Answer 1

Good afternoon.
And how was this Office bought - in a box or under corporate licensing?