This product key For Ms office 2016 is a prepaid code that is not compatible with preinstalled software. It is an original Microsoft code.
1. You must uninstall the preinstalled Office on your computer.
2. Go to: https://setup.office.com/
3. Log in with your Microsoft account (this account must not contain any other Office product, if so please create a new account).
4. After you redeemed the prepaid key will appear Microsoft Office 2016 Professional Plus in your Microsoft account:
5. Download Microsoft Office in the language of your choice and install it on your PC (it does not need any further activation).
6. In order to activate the remaining PCs you no longer need to redeem the key again, it has been already used activating your recently created Microsoft Account.
Please go into each PC and login into your activated Microsoft Account (https://setup.office.com), then open a new tab or a new window and type: https://setup.office.com/home/getoffice
You should see your product description in it along with a Download button.
Once downloaded and installed go into Word->File->Account, make sure it is logged in with the activated Microsoft Account and go into “Activate Product”.
Finally select “Online activation”, once done the product should be activated.
7. In case your activation online, does not work you can also contact the following
From USA and Canada: 888 352 7140 / outside USA and Canada: 716 871 2781
From United Kingdom: 0 800 018 8354 outside UK: +44 203 147 4930
Dialing the telephone number corresponding to your country, you will be answered by an automatic answering machine. Please, try it several times, sometimes the machine does not work good.