Windows Security Log Event ID 4777

4777: The domain controller failed to validate the credentials for an account

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This event does not seem to exist.  I have never observed it.  Furthermore, 4776 is logged for both success and failure.

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Mini-Seminars Covering Event ID 4777 Security Log Exposed: What is the Difference Between “Account Logon” and “Logon/Logoff” Events? 27 Most Important Windows Security Events 4 Threat Detections using Active Directory Authentication Events from the Windows Security Log Top 6 Security Events You Only Detect by Monitoring Workstation Security Logs Assessing the Security of Your Active Directory: User Accounts

 

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