As the network administrator, you might want to delete an unneeded or unused realm from the network authentication service configuration. You might also need to remove a default realm to recover from some application problems with applications that are integrated on the system.
For example, if you have configured network authentication service without setting up the Kerberos server in your network, QFileSvr.400 and Distributed Data Management (DDM) will assume that you are using Kerberos authentication. Before setting up authentication for these products, you should delete the default realm that you have specified during network authentication service configuration.
To delete a realm to the network authentication service...