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Select your version of Microsoft 365 below to learn how to activate Microsoft 365.
Activate Microsoft 365 or a non-subscription version of Office
When you start an Microsoft 365 app that's not activated, you'll be prompted to sign in to Microsoft 365. Be sure to sign in using the Microsoft account, or work or school account, that you used to buy or subscribe to Microsoft 365.
Note
If Microsoft 365 came pre-installed on your new device, see Activate Office that's pre-installed on a new Windows device.
If the Activation wizard appears, Microsoft 365 needs your help to activate. Follow the prompts in the wizard to activate Microsoft 365.
Activate Microsoft 365 or a non-subscription version of Office that's pre-installed on a new Windows device
Microsoft 365 is installed as a Microsoft 365 Personal trial
You can activate Microsoft 365 as a 1-month trial of Microsoft 365 Personal. You can also buy Microsoft 365, add Microsoft 365 to an existing Microsoft 365 subscription, or enter a product key from a product key card. If you have an older copy of Microsoft 365, you can install that instead.
You can also try our guided support in your browser to help with activation issues.
I thought this device included Microsoft 365 or a non-subscription version of Office.
Set up Microsoft 365 that's pre-installed on a new Windows device
Learn how to set up Office on your new Windows device. The option you select will depend if your device included a product key or if it didn't. See Set up pre-installed Office.
Activate Office from Microsoft Workplace Discount Program
If you bought Office Professional Plus, Visio Professional, or Project Professional through your employer's Microsoft Workplace Discount Program (formerly known as Microsoft Home Use Program) benefit, select I don't want to sign in or create an account (at the bottom of the screen) and enter your product key.
Activate a brand new or Microsoft 365 product key
If you bought a new Microsoft 365 product key card, or you received a product key when you bought Microsoft 365through an online store, go to Office.com/setup or Microsoft365.com/setup and follow the on-screen prompts. This is a one-time process that adds your new product to your Microsoft account. After you redeem your key, you can install Office.
Troubleshoot activation errors
If Microsoft 365 can't activate, it eventually becomes unlicensed and all editing features of Microsoft 365 are disabled. Microsoft can become unlicensed for a number of reasons. For example, if your Microsoft 365 subscription expires, you must renew your subscription to restore all features of Microsoft 365.
If Microsoft 365 was pre-installed on your new PC, you must start an Microsoft 365 Family trial or buy Microsoft 365 to continue using Microsoft 365.
Note
If you're running Microsoft 365 on Windows 7 (which is no longer supported, see Windows 7 end of support and Office), you need to make sure that TLS 1.2 is enabled by default. See Update to enable TLS 1.1 and TLS 1.2 as default secure protocols in WinHTTP in Windows.
See also
A subscription notice appears when I open a Microsoft 365 application
You get the Office error "The products we found in your account can't be used to activate <app>"