Guide basé sur des sources officielles

Office 2021 Professional Plus Activation Guide

Guide for redeeming and installing Office 2021 Professional Plus using Microsoft official setup pages and activation prompts.

DifficultéEasy
Temps estimé10 minutes
Type de licenceClé de produit
Dernière vérification7 juil. 2026
Statut du guideVérifié

Before you start

Sign in with the Microsoft account you want to associate with the license, redeem the key on the official Office setup page when applicable, then install and activate Office.

Étapes d’activation

Open the Office setup page

Go to the official Microsoft Office setup page and sign in with your Microsoft account.

Illustration de Open the Office setup page

Redeem the product key

Enter the product key exactly as delivered, then continue through Microsoft’s setup flow.

Illustration de Redeem the product key

Download and install Office

After redemption, download and install the Office apps from your Microsoft account or the setup page.

Illustration de Download and install Office

Open an Office app to activate

Open Word, Excel, or another Office app and follow the activation prompt if it appears.

Illustration de Open an Office app to activate

Dépannage

Wrong Microsoft account

Use the account that redeemed the product key. A key can usually only be redeemed once.

Activation wizard appears

Follow the Microsoft Activation Wizard prompts and sign in with the correct account.

FAQ

Where do I enter an Office key?

Microsoft directs customers to the correct setup site for their Office product key.