This page indicates whether Windows is activated.
Select Update & Security, and then select Activation.To check the activation status in Windows 10 or 11, select the Start button. Microsoft Windows 10 or 11 must be activated before you can redeem and activate Microsoft Office 2019, 2021, or 365. If your computer shows connectivity issues, use the Windows Network Troubleshooter to correct the problem. To redeem and activate Microsoft Office that is installed on your computer, you need an active Internet connection. However, the steps in this video are applicable for Office Activation on Windows 11 as well. Note: This video makes use of Windows 10 to walk you through the Activation process.