To delete a user
  1. Select the checkbox to the left of the name of the user(s) to be deleted.
  2. Click Delete.
  3. Click Close to return to the Edit Realm page.
More Information
Equivalent asadmin command

delete-file-user

Managing Users with Network Security Services (NSS)

You can manage users using either the Admin Console as discussed in Managing file Realm Users or using NSS tools. NSS is a set of libraries designed to support cross-platform development of security-enabled client and server applications. Applications built with NSS can support SSL v2 and v3, TLS, PKCS #5, PKCS #7, PKCS #11, PKCS #12, S/MIME, X.509 v3 certificates, and other security standards. For detailed information, link to the following URLs:

Configuring Mutual Authentication

In mutual authentication, both server and client-side authentication are enabled. To test mutual authentication, a client with a valid certificate must exist. For information on mutual authentication, see the Security section of the http://java.sun.com/javaee/5/docs/tutorial/doc/index.html.

To enable mutual authentication for a specific application, in the deployment descriptor, set the method of authentication to Client-Certificate. For more information about using deploytool, refer to the Security section of the Java EE 5 Tutorial.