This event notifies you that a report is available for viewing account change events. The report is named AD Account Changes.
To prevent this report from being generated and the alert from appearing again, disable the 'Create Account Changes Report and Alert' rule.
To prevent this alert from appearing again but the report to continue to be generated, disable the 'Create Account Changes Report and Alert' rule, and enable the 'Create Account Changes Report' rule
Microsoft Help and Support for Microsoft Windows Server 2008 and above
Microsoft Knowledge Base