Event Details
User Activity->Logons->Failed Logons->Windows 2008->EventID 4775 - An account could not be mapped for logon.
EventID 4775 - An account could not be mapped for logon.
It appears that this event never occurs.
 Sample: 
        An account could not be mapped for logon.

        Authentication Package:		%1
        Account 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 Logon
Source Microsoft-Windows-Security-Auditing
TaskCategory Credential Validation
EventId 4775
Field Matching
FieldDescriptionStored inSample Value
When At what date and time a user activity originated in the system. DateTime
Who Account or user name under which the activity occured. Account Name
What The type of activity occurred (e.g. Logon, Password Changed, etc.) Task Category Logon
Where The name of the workstation/server where the activity was logged. Computer
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" High
WhoDomain -
WhereDomain -
Result Successful or Failed. "Failed" Failed
Failure Reason Failure Reason - Bad user name or password, not enough privileges, etc. "An account could not be mapped for logon" An account could not be mapped for logon
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