To check if your Microsoft account is associated with Office, sign in to Services & subscriptions. Clippy, the animated Microsoft Office Assistant, is back. Excel Details: Activate Microsoft 365, 2019, 2016, and 2013.When you start an Office app that's not activated, you'll be prompted to sign in to Office.Be sure to sign in using the Microsoft account, or work or school account, that you used to buy or subscribe to Microsoft 365. How to activate Microsoft Office 2016 without a product key: This method is the simplest method and only requires a short time.
