Enter your Office product key, without hyphens, if prompted.Be sure to remember this account so that you can install or reinstall Office later, without a product key. Sign in with your Microsoft account, or create one if you don't have one.Office 365, Office 2019, Office 2016, and Office 2013 (PC and Mac) If your purchase of an Office product came with a 25 character product key, you can use the steps below based on which product you have to find out where you should enter that key to download and install your Office product.
