To check if your Office installation is activated through KMS, you can use the built-in Command Prompt tool. First, open Command Prompt by searching for “cmd” in the Start menu. Then, type `cscript ospp.vbs /dstatus` and press Enter. This command runs a script that displays the activation status of Office. Look for the “License Status” section in the output. If it shows “Licensed” and indicates a KMS-based activation, then your Office is activated using KMS. You can also check the “Product Key Channel” to see if it mentions KMS. If you’re unsure or need further assistance, contacting Microsoft Support or your organization’s IT department can provide more specific information based on your setup.