Event Details
User Activity->Account Management->Account Changes->User Account Changes->Windows 2008->EventID 4774 - An account was mapped for logon.
EventID 4774 - An account was mapped for logon.
 Sample: 
        An account was mapped for logon.

        Authentication Package:	%1
        Account UPN:	%2
        Mapped Name:	%3
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 Logon
Source Microsoft-Windows-Security-Auditing
TaskCategory Credential Validation
EventId 4774
Field Matching
FieldDescriptionStored inSample Value
When At what date and time a user activity originated in the system. DateTime 10.10.2000 19:00:00
Who Account or user name under which the activity occured. Mapped Name
What The type of activity occurred (e.g. Logon, Password Changed, etc.) "User Account Changes" User Account Changes
Where The name of the workstation/server where the activity was logged. Computer DC1
Where From The name of the workstation/server where the activity was initiated from. - 10.10.10.10
Severity Specify the seriousness of the event. - High
WhoDomain -
WhereDomain -
Whom Account or user name being managed. - Administrator
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