Microsoft Office 2021 Pro Plus, the successor to Microsoft Office Pro Plus 2019, is a productivity suite. It is a professional suite of office productivity tools produced by Microsoft. It comes with several applications, including Word, PowerPoint, Excel, and Outlook.

The suite comes with several useful features, such as support for multiple file formats, compatibility with various devices, and support for macros. It also comes with various safety features, such as a password-protection feature and automatic updates.

How to activate Office 2021 Pro Plus Key Retail:

• Download and install from here
• Open a Office app, for example Word
• Go to Account
• There will be a message about activation required - choose "I have a product key" option and
• Activate Office 2021 Pro Plus with phone verification option - you will be given a phone number and an installation ID - call to that phone number and enter the code, then you will get a confirmation ID.
• Enter the confirmation ID on software
• Office 2021 Pro Plus has been activated.