The procedure is the same for Office 365 license keys. This post covers everything about how to activate your copy of Microsoft Office on Windows 11/10. But if you are still not ready for the cloud and you prefer lifetime licenses over subscriptions, Office 2021/2019/2016 is the way out for you. The activation key is tied to your email account, and you must renew the subscription according to your plan. Most people are moving to Office 365, which is a cloud-based subscription product.