I am reading this link @ https://sharepointstew.wordpress.com/2021/07/07/app-only-authentication-in-sharepoint-online-using-latest-azure-sdk/ which show how we can associate a self-signed certificate with an Active Directory registered application. but my question is if we want to use this application for production environment, so what are the steps to upload a real certificate instead of using self-signed certificate?
Thanks