: Ensure setup.exe and the .xml file are in the same directory. If the command fails, double-check that you are using forward slashes / and not backslashes \ for the switches. Deploy Office Long Term Service Channel (LTSC) 2021

setup.exe configure configuration-office2021enterprise.xml

Replace the XXXX-XXXX-XXXX-XXXX-XXXX with your actual product key. Adjust the language, products, and app inclusion/exclusion according to your needs.