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 …

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

Learn how to redeem a gift card, code, or Office product key and spend your balance at Microsoft Store online, on Windows, or Xbox.

How to change your product key to fix activation errors that can occur if you own and install multiple one-time purchases of Office..

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 …

Many tasks for Office products don't require a product key because your Microsoft account takes care of them instead.

Get help with product key errors, or geographical region errors, when you redeem a new Office product key on Office.com/setup.

If you downloaded Office from an online store, the product key should be in your email receipt. If you didn’t get a receipt, check your junk mail folder. If Office came with a box, card, or disc, …

Learn how to find your product key for Office 2010 or locate a lost Microsoft Office 2010 product key.

Help to fix install errors for Office, such as "can’t install Office", "something went wrong" or situations where install hangs or activation fails.