Event Details
Operating System->Microsoft Windows->Built-in logs->Windows 2008 or higher->Security Log->Account Management->User Account Management->EventID 4740 - A user account was locked out.
EventID 4740 - A user account was locked out.
Indicates that a user account ("target account") was locked out due to the fact that the number of consecutive failed logon attempts exceeded the maximum allowed number set in the Domain Lockout Policy, or in case of local accounts - in the local lockout policy.

Find more information about this event on ultimatewindowssecurity.com.

Corresponding events on other OS versions:
Windows 2000, 2003
 Sample: 
Log Name:      Security
Source:        Microsoft-Windows-Security-Auditing
Date:          10/27/2009 10:16:15 PM
Event ID:      4740
Task Category: User Account Management
Level:         Information
Keywords:      Audit Success
User:          N/A
Computer:      dcc1.Logistics.corp
Description:   
A user account was locked out.
Subject:
	Security ID:		S-1-5-18
	Account Name:		DCC1$
	Account Domain:		LOGISTICS
	Logon ID:		0x3e7
Account That Was Locked Out:
	Security ID:		S-1-5-21-1135140816-2109348461-2107143693-1601
	Account Name:		Paul
Additional Information:
	Caller Computer Name:	DCC2
===========================
Description template stored in adtschema.dll:
===========================
A user account was locked out.

Subject:
	Security ID:		%4
	Account Name:		%5
	Account Domain:		%6
	Logon ID:		%7

Account That Was Locked Out:
	Security ID:		%3
	Account Name:		%1

Additional Information:
	Caller Computer Name:	%2
Log Type: Windows Event Log
 Uniquely Identified By:
Log Name: Security
Filtering Field Equals to Value
OSVersion Windows Vista (2008)
Windows 7 (2008 R2)
Windows 8 (2012)
Windows 8.1 (2012 R2)
Windows 10 (2016)
Category Account Management
Source Microsoft-Windows-Security-Auditing
TaskCategory User Account Management
EventId 4740
Field Matching
FieldDescriptionStored inSample Value
DateTime Date/Time of event origination in GMT format. DateTime 10.10.2000 19:00:00
Source Name of an Application or System Service originating the event. Source Security
Type Warning, Information, Error, Success, Failure, etc. Type Success
User Domain\Account name of user/service/computer initiating event. User RESEARCH\Alebovsky
Computer Name of server workstation where event was logged. Computer DC1
EventID Numerical ID of event. Unique within one Event Source. EventId 576
Description The entire unparsed event message. Description Special privileges assigned to new logon.
Log Name The name of the event log (e.g. Application, Security, System, etc.) LogName Security
Task Category A name for a subclass of events within the same Event Source. TaskCategory
Level Warning, Information, Error, etc. Level
Keywords Audit Success, Audit Failure, Classic, Connection etc. Keywords
Category A name for an aggergative event class, corresponding to the similar ones present in Windows 2003 version. Category Account Logon
Object Name -
Whom -
Object Type -
Class Name -
Security ID -
Account Name -
Account Domain -
Subject: Account Name Name of the account that initiated the action. InsertionString5 ALebovsky
Subject: Account Domain Name of the domain that account initiating the action belongs to. InsertionString6 LOGISTICS
Subject: Logon ID A number uniquely identifying the logon session of the user initiating action. This number can be used to correlate all user actions within one logon session. InsertionString7 0x2a88a
Subject: Security ID InsertionString4 S-1-5-18
Account That Was Locked Out: Security ID InsertionString3 S-1-5-21-1135140816-2109348461-2107143693-1601
Account That Was Locked Out: Account Name InsertionString1 Paul
Additional Information: Caller Computer Name InsertionString2 DCC2
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