public LdapName getAlternateBaseDN() {
        return alternateBaseDN;
    }
Returns the alternate starting DN that searches for users will performed with.
Searches will performed on the entire sub-tree under the alternate base DN after
they are performed on the main base DN.

@return the alternate starting DN used for performing searches. If no alternate
     DN is set, this method will return {@code null}.
xmppserver/src/main/java/org/jivesoftware/openfire/ldap/LdapManager.java