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ActiveDirectory as LDAP identity store configuration example:
<security:identity-manager identity-store="#{ldapIdentityStore}"/>
<security:ldap-identity-store name="ldapIdentityStore"
server-address="domain-controller.foo.com"
server-port="389"
bind-DN="BindActiveDirectoryUser"
bind-credentials="BindActiveDirectoryUserPassword"
user-name-attribute="sAMAccountName"
user-DN-prefix="FOO\"
user-DN-suffix=""
user-context-DN="OU=Foo Users and Groups,DC=foo,DC=com"
role-context-DN="OU=Foo Users and Groups,DC=foo,DC=com"
user-role-attribute="memberOf"
role-name-attribute="name"
user-object-classes="user"
role-object-classes="group"/>