Learn how to activate Office that is pre-installed on new Windows 10 PCs or using a new product key.

If your purchase of Office or Microsoft 365 came with a product key, you enter your product key on one of the websites listed below for your product. After you enter your key, you can download and install …

Découvrez comment activer Office préinstallé sur de nouveaux PC Windows 10 ou à l’aide d’une nouvelle clé de produit.

Alternatively, if you have successfully installed Microsoft 365 or Office on your computer, but need help with activating or reactivating it, please go to: For Microsoft 365 - Activate Office.

Use your Microsoft account , not your product key, to install and activate Office and individually purchased Microsoft 365 apps, such as Project, Visio, Word, Excel, and Outlook.

If you need help activating Office , see Activate Office for Mac. If Office activation fails, see What to try if you can't install or activate Office for Mac.

If you haven't installed Office on another computer yet, follow the instructions in Install Office on your PC or Mac. Follow the steps in Activate by telephone, described above.

To fully use Office, you must activate Office. If you do not activate the product after you install it, the Office programs can be started only in reduced-functionality mode.

On Macs and mobile devices, sign in using your work or school account to activate Office. Office remains activated as long as you're signed in. If you sign out, your apps will be deactivated. You can …

Apr 25, 2017 · We have released a fix for this issue on March 9, 2017 for Office 2016 customers in build 16.0.7870.2020 or higher. For older versions of Office, we are continue to work on fixing this issue. In …