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Event ID: 516 Source: Security

Source
Description
Internal resources allocated for the queuing of audit messages have been exhausted, leading to the loss of some audits.

Number of audit messages discarded: <number>
Comments
 
This event may be incorrectly logged in the local Security log in Microsoft Windows Server 2003 or in Microsoft Windows XP. See ME922769 to see why this issue occurs and how to solve it.
This event record indicates that audit event records have been discarded, due to overwriting of earlier records or due to cessation of auditing, depending on the audit policy you have established; or by internal event queues exceeding their maximum length.

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