As per Microsoft: "This message usually indicates a problem accessing Active Directory (AD). Or, the service could be down or busy. It may also indicate that the Address List service is either down or busy". See MSEX2K3DB for information on this event.
Build a great reporting interface using Splunk, one of the leaders in the Security Information and Event Management (SIEM) field, linking the collected Windows events to www.eventid.net.
Obtain enhanced visibility into Cisco ASA firewall logs using the free Firegen for Cisco ASA Splunk App. Take advantage of dashboards built to optimize the threat analysis process.