On the
Summary of Security Realms page select the name of the realm (for
example, myrealm).
On the
Settings for Realm Name page select
Users and Groups > Users.
In the Users
table select the check box next to each user name you want to
delete.
If you have a large number of users, use the Customize
this table link to retrieve and list only the users that
match your search criteria. The Filter By
field uses the asterisk (*) as the wild card character.