Here's another OpsMgr 2007 tip from Milan Jajal, a support engineer in our Manageability group. I hate to steal his thunder, but he basically says that if you're seeing 570 security audit failures sourced from Microsoft Operations Manager
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Read the complete post at http://blogs.technet.com/smsandmom/archive/2008/10/20/opsmgr-2007-failure-audit-events-570-in-security-event-log-of-rms-server.aspx