A customer wants to implement X.509 certificate authentication on their users. They want to extract the username from each certificate for accounting and single sign-on purposes. The correct…

A customer wants to implement X.509 certificate authentication on their users. They want to extract the username from each certificate for accounting and single sign-on purposes. The correct username syntax lies within the common name portion of the certificate's subject field. Which username template should you use on the certificate authentication server's configuration?