Examples of Office product keys

An Office product key uses a combination of 25 letters and numbers in this format:

XXXXX-XXXXX-XXXXX-XXXXX-XXXXX

Shows an example of an Office product key

Product keys include hyphens, but you can omit them when you enter your product key.

You can sign in to activate Office 365, Office 2016, or Office 2016

If Office is prompting you for a product key, you can enter your Microsoft account instead. Try selecting the Sign in with an active account instead link in the Enter your product key dialog box and sign in with the Microsoft account that you associated with Office. We can help if you can't remember the Microsoft account you use with Office.

Note: If you're using Office Professional Plus, you'll need a product key to activate Office.

I can't find my product key

Here's where to get help with your product key:

Is that an O or a 0?

Some numbers and letters look similar for Office 2007 and Office 2010 product keys. Use this guide to help tell the letters and numbers apart.

Shows the font used for letters and numbers in an Office product key

Contact support about my product key

If you’ve followed the guidance in this article and still need help, visit our Microsoft support page for assistance.

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