User Defaults Tab (Configuration Dialog Box)

From the Configuration menu, choose Configure Realms.
Click the User Defaults tab.

NOTE:If the Configure Realms command is unavailable (dimmed), your system administrator has disabled this capability. Contact your system administrator for information about how to add or change the realms you may use.

From this tab, you can specify the default realm and storage medium for your PC.

The options are:

Default realm	Select a realm from the list. This default determines the realm that the Kerberos client uses when a new user requests Kerberos authentication.
Default storage media	Specify the storage medium you want to use when you create a new principal profile. (You can not use hidden storage as a default.) You can override the Default storage media setting by selecting a Storage media setting when you create a new profile.