A comprehensive suite of productivity tools and cloud services that enhance collaboration, communication, and efficiency. Combining classic Office apps with advanced Microsoft 365 features, it supports both personal and business needs
If you previously purchased Office 2021, sign in to the Microsoft account you used when activating it and check Services & subscriptions.
If Office 2021 is listed, you can reinstall it and activate it by signing in with the same account.
If it isn't listed, check your original purchase email, invoice, or product key.
Other
- Go to the Microsoft account Services & subscriptions page.
- Sign in with the Microsoft account you used to purchase or activate Office.
- Check whether Office 2021 is listed under your products.
- If it is listed, select Install and reinstall Office.
- After installation, open Word or Excel and sign in with the same Microsoft account to activate it. Microsoft confirms that, after a product key has been redeemed, the associated Microsoft account can be used to reinstall Office without entering the original key again.
If Office 2021 is not listed in your account, check your original purchase email, invoice, product-key card, or Microsoft Store purchase history.