This subcategory reports detailed information about the information replicating between domain controllers. These events can be very high in volume. Events for this subcategory include: - 4928: An Active Directory replica source naming context was established. - 4929 : An Active Directory replica source naming context was removed. - 4930 : An Active Directory replica source naming context was modified. - 4931 : An Active Directory replica destination naming context was modified. - 4934 : Attributes of an Active Directory object were replicated. - 4935 : Replication failure begins. - 4936 : Replication failure ends. - 4937 : A lingering object was removed from a replica. Refer to the Microsoft Knowledgebase article "Description of security events in Windows Vista and in Windows Server 2008" for the most recent information about this setting: http://support.microsoft.com/kb/947226. Countermeasure: Enable Audit policy settings that support the organizational security policy for all the computers in your organization. Identify the components that you need for an audit policy that enables your organization to hold users accountable for their actions while using organizational resources and enables IT departments to detect unauthorized activity efficiently and then track those events in log files. Potential Impact: If no audit settings are configured, or if audit settings are too lax on the computers in your organization, security incidents might not be detected or not enough evidence will be available for network forensic analysis after security incidents occur. However, if audit settings are too severe, critically important entries in the Security log may be obscured by all of the meaningless entries and computer performance and the available amount of data storage may be seriously affected. Companies that operate in certain regulated industries may have legal obligations to log certain events or activities.

[audit_none/audit_success/audit_failure/audit_success_failure]

(1) GPO: Computer Configuration\Windows Settings\Security Settings\Advanced Audit Policy Configuration\Audit Policies\DS Access\Audit Policy: DS Access: Detailed Directory Service Replication