Activate Office 365 Home, Personal, University, Office 2013, or Office 2016
In many cases, you won’t need a product key to activate Office. However, if you do need one, here’s where to find it:
Activate Office on a Windows computer
If you’re connected to the Internet when you install Office, it should automatically activate for you. If it doesn't, open an Office application, click File > Account > Activate Product.
Activate a free Office 365 subscription that came with your computer
On the Start screen, click the Office tile.
Sign in with your Microsoft account. If you don’t have an account, you can create one.
At the bottom of your screen, click Run.
Follow the prompts to install Office.
Activate Office 2013 or Office 2016 on a different PC
If you move Office to a different PC, you’ll need to activate by phone. You’ll find the number in the Activation Wizard:
In any Office application, click File > Account > Activate Product.
In the Activation Wizard, click I want to activate the software by telephone > Next.
Tip If nothing happens when you select Next, use the Enter key on your keyboard.
Select your country/region.
Call the Product Activation Center phone number that’s under Step 1.
Activate a volume license
To activate a commercial or enterprise copy of Office, see Activate volume editions of Office.
Troubleshoot activation failures
If Office fails to activate, you can continue using Office for awhile, but eventually Office enters reduced functionality mode. Most buttons and features are disabled (greyed out), and (Unlicensed Product) appears in the title bar. If this happens, see Unlicensed Product errors in Office for help with troubleshooting common activation failures.