How to Activate Your Microsoft Office Product (2019, 2021) ?
To activate your product key, please follow the steps below.
Step 1: Please uninstall any previous versions of Office before installing this version.
Step 2: Go to www.office.com/setup
Step 3: Sign in with your Microsoft account, or create one if you don’t have one.
Step 4: Enter your product key provided, without hyphens.
Step 5: Follow the prompts to finish the installation process.
For OFFICE 365, please follow instructions here
=> https://prowebsoftware.net/365-account-activation/
How to Activate Your Windows Product ?
Windows 10 : https://prowebsoftware.net/microsoft-windows-10-professional/
Windows 11 : https://prowebsoftware.net/microsoft-windows-11-professional/