Here is step by step:
Office 2019 Pro Plus:
– Login or create a new account on the official website:
Office 2019 http://setup.office.com/
Enter the product key and select your country
-Click continue, download office setup and open
– Once the setup finishes the installation, open any office program (word, ..)
– Choose to activate by telephone and follow the activation guide bellow in the video To get your CID:
activation website: https://getcid.info