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Your Microsoft account takes the place of your Office product key for many tasks, such as activating Office and reinstalling Office.

Common questions about Office product keys

Check the sections below to find out if you need an Office product key and what to do with your key if you have one.

You just bought Office

You're using Office

View your product key

Get help with your product key

I just bought Office. Where do I enter my product key?

If you bought a new, never used product key

If you have a new, never used product key, go to www.office.com/setup and follow the on-screen prompts.

If you bought Office through the Microsoft Store

If you bought Office through the Microsoft Store, you can enter your product key there.

1. Go to www.microsoftstore.com. In the upper right-hand corner, select Sign in and enter the user ID and password you used to buy Office.
2. After you sign in, select your name in the upper right-hand corner, and then select Order History.
3. Locate the Office one-time purchase or individual Office app, and then select Install Office to view your product key (this doesn't actually install Office).
4. Select Install Office again in the window where the product key appears.
5. On the Hi. Let's get your Office page, follow the prompts to associate your product key with your Microsoft account and start the installation process.

If you bought Office through Microsoft HUP

When you install Office Professional Plus, Visio Professional, or Project Professional through your employer's Microsoft HUP benefit, you enter your product key after you install your product.

1. Start any Office app, such as Word, Visio, or Project, depending on your purchase.
2. In the Sign in to set up Office screen, select I don't want to sign in or create an account (it's a small link at the bottom of the window).
3. Enter your Microsoft HUP product key to activate Office.
   For help, see Get help installing Office through Microsoft HUP

My new Windows 10 PC came with Office but I can't find a product key

If you see a Let's get started screen with options to try, buy, or activate Office, this means that Office is installed on your new PC as a 1-month trial of Office 365 Home. You won't receive a product key from your PC manufacturer unless you paid for an Office product key card. Instead, you can start a trial of Office 365 Home, or buy Office.

If you paid for an Office product to be included on your new Windows 10 PC, a digital product key is transmitted to your PC when you activate Windows 10. You won't receive a printed product key. Instead, you'll see a message similar to the following when you start Word (or any Office app).

I bought a product key card but there's no key on it

If you bought an Office product key card, you might need to carefully scratch off a silver foil coating on the back of your product key card to reveal your product key. If you damage the key while scratching off the foil coating, see I lost or damaged my product key.

Tip: A product key card might also contain bar codes and other groups of letters and numbers, but the product key will always be shown in the format XXXXX-XXXXX-XXXXX-XXXXX-XXXXX.

Office is prompting me for a product key

Use your Microsoft account, not your product key, to install and activate Office and individually purchased Office apps, such as Project, Visio, Word, Excel, and Outlook.

Sign in to install Office

Bookmark the site below so you always know where to go to install Office.

Sign in to activate Office

If an Office app prompts you to activate, sign in with your Microsoft account instead of a product key.

Use the right Microsoft account

Make sure you sign in with the Microsoft account that you used to buy Office.

Note: If you bought a new, unused Office 365 product key card to renew an Office 365 subscription or to buy your trial, you can enter that product key if Office prompts you for it. You can also enter the product key at www.office.com/setup.

There are a few exceptions where you'll need to do something other than sign in.

• If you bought Office Professional Plus, Visio Professional, or Project Professional through your employer's Microsoft HUP benefit, you'll need your product key to install Office on a PC. To locate your product key online, see Get your HUP product key.
• If you're using a volume license version of Office Professional Plus at work, you'll need to contact your admin for a product key.
• If you see a yellow or red banner in an Office app that says SUBSCRIPTION EXPIRED, you must renew your Office 365 subscription to keep using Office. For help, see Renew Office 365 for home.

• If Office came pre-installed on your new device, and you see a yellow or red banner in an Office app that says PRODUCT NOTICE Most of the features of <app> have been disabled because it hasn't been activated, you must start a new Office 365 Home trial, sign in with a Microsoft account that's associated with Office, or buy Office. For help, see Activate Office.

If you bought Office Professional Plus online, see Can I buy a product key? or, if your product key isn't working, see My Office product key isn't working.

Do I need a product key to reinstall Office?

No, you don't. Just go to the Microsoft account, Services & subscriptions page and sign in using the Microsoft account that you used to buy Office. We can help if you forgot your Microsoft account or password.

Note: You need a product key to reinstall Office Professional Plus, Visio Professional, or Project Professional through Microsoft HUP. For help, see Get help installing Office through Microsoft HUP.

Can I change my product key?

Yes, you can change the product key for Office Home & Business, Office Home & Student, Office Professional, and individually purchased Office apps. To learn how, see Change your Office product key

You can also switch your Office license if you buy a different version of Office. For example, if you have Office Home & Business and decide to subscribe to Office 365, you can switch your existing install from Office Home & Business to Office 365. To learn how, see Switch your Office license.

Can I view my product key in Office?

No, you can't. For security reasons, the full product key isn't displayed within Office.

Instead, for Office 365, Office 2019, and Office 2016, you can view the Microsoft account that Office belongs to. This account takes the place of your product key and can be used to reinstall Office from the Microsoft account, Services & subscriptions page and to activate Office.

To view the Microsoft account that Office belongs to, open a document in Word (or any Office app) and go to File > Account. Look for the email address after Belongs to below the product name.

Can I view my product key online?

If you bought Office 365 or Office Home & Student

Your product key isn't displayed online. If Office is prompting you for a product key, you can sign in using the Microsoft account that you used to buy and download Office.