Stop Account Lockouts Fast: Account Lockout Examiner for PowerShell
Active Directory account lockouts are a major headache for IT administrators. A single misconfigured service, mapped drive, or mobile device can trigger continuous lockouts, leading to frustrated users and flooded helpdesk queues. Finding the root cause of these lockouts manually through Event Viewer takes too long.
You can automate this troubleshooting process using PowerShell. By querying domain controllers directly, a PowerShell script acts as an automated Account Lockout Examiner, identifying the source of the lockout in seconds. The Core Concept: Hunting the Event Logs
When an account locks out, the domain controller responsible for the authentication logs a specific security event. To build an examiner script, your main target is Event ID 4740 (A user account was locked out). This event contains critical pieces of information: The locked-out username. The exact timestamp of the lockout.
The caller computer name (the machine where the bad password attempts originated).
Because any domain controller in your network can process the logon attempt, a robust PowerShell solution must query all domain controllers to find the event. The PowerShell Account Lockout Examiner Script
This PowerShell script searches all domain controllers in your current domain for Event ID 4740. It extracts the locked account name, the source machine, and the exact time of the event. powershell
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