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Navigate to /user_projects/domains/bi/config/fmwconfig
Backup jps-config.xml

Add the following parameters to that file.

<property name="oracle.security.jps.pdp.AuthorizationDecisionCacheEnabled" value="false"/>

<property name="oracle.security.jps.ldap.policystore.refresh.interval" value="60000"/>


This will move the default down to 1 minute. If you want it less than that you can change the value to 0 which should make it real-time.