How to activate a Microsoft Office Professional key?

Activating a Microsoft Office Professional key is really simple, just follow those short steps:

OPTION 1:

Uninstall your current Office set up
Reboot your computer
Install Office using the official offline installer, available at the official Microsoft.com download link: http://officecdn.microsoft.com/pr/492350F6-3A01-4F97-B9C0-C7C6DDF67D60/media/en-us/ProPlus2019Retail.img (Please copy the link and paste into your browser search bar)

NOTE: If you are having problems with slow download of the large size Office setup ISO file, then we suggest to use the following safe lightweight opensource freeware software in order to consistently speed up the download and avoid download timing out or failing due to slow internet speed or connection loss due to server issues:

https://www.freedownloadmanager.org/

After installing the software, simply copy/paste the download link on the download manager, and it will download the file for you until completion without further issues.

Download link for Microsoft Office Professional 2021 Plus 1 Retail:

https://officecdn.microsoft.com/pr/492350f6-3a01-4f97-b9c0-c7c6ddf67d60/media/en-us/ProPlus2021Retail.img

PRODUCT KEY ACTIVATION

In order to easily and quickly finalize your Office activation within few minutes, please kindly proceed as follows:

Open Word, wait for the Activation Wizard pop-up box to appear, then select the second option which says "I want to activate the software by telephone", and select Next. If Activation Wizard windows doesn't automatically appear, then open Word, on the "Home" screen go to "Account" section on bottom left, then select "Activate Product" on the red banner on center page under Product Information.
Please, kindly send us (via LiveChat or email) a full-size screenshot of this next screen, which shows an "Installation ID" composed by a long series of numbers for your Office activation on your device. We will then proceed to contact Microsoft product activation center in order to obtain the "Confirmation ID" which you require to finalize your Office activation.

Screenshots visual guide for Office Activation Wizard phone activation procedure:

https://gyazo.com/359d7677f9117920c6d4e95d15ca0a08

https://gyazo.com/1ef38642df694ee51f53fe77a40c0d61

(If you prefer, you can proceed with the Office phone activation automated guided procedure on your own, and you will be able to finalize your Office activation through Microsoft activation center by following the Microsoft Office Activation Wizard guided steps.)

OPTION 2:

Reedeem the key at setup.office.com.

Download Links:

MS Office 2021 Pro Plus - HERE
MS Office 2019 Professional - HERE
MS Office 2019 Professional Plus- HERE
MS Office 2016 Professional- HERE
MS Office 2016 Professional Plus- HERE
MS Office 2013 Professional- HERE

"Telephone activation is no longer supported for your product" Error

The key is not working

If you have activated the key according to the guide but the code appears not to work, please check what type of error message you receive and depending on it follow the appropriate instructions: