Windows Security Log Event ID 646

Operating Systems Windows Server 2000
Windows 2003 and XP
CategoryAccount Management
Type Success
Corresponding events
in Windows 2008
and Vista
Discussions on Event ID 646
what constitutes a change
Account changed on a DCPromo?

646: Computer Account Changed

On this page

"Target" computer account was changed by "Caller" user. For some types of changes the event will include a description of what was changed on the 2nd line of the description.

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Description Fields in 646

  • Computer Account Changed: %1
  • Target Account Name: %2 (A computer account is always followed by a "$".) 
  • Target Domain: %3
  • Target Account ID: %4
  • Caller User Name: %5
  • Caller Domain: %6
  • Caller Logon ID: %7
  • Privileges: %8
  • Changed Attributes: (The following events appear in Server 2003 only)
  • Sam Account Name: %9
  • Display Name: %10
  • User Principal Name: %11
  • Home Directory: %12
  • Home Drive: %13
  • Script Path: %14
  • Profile Path: %15
  • User Workstations: %16
  • Password Last Set: %17
  • Account Expires: %18
  • Primary Group ID: %19
  • AllowedToDelegateTo: %20
  • Old UAC Value: %21
  • New UAC Value: %22
  • User Account Control: %23
  • User Parameters: %24
  • Sid History: %25
  • Logon Hours: %26
  • DNS Host Name: %27
  • Service Principal Names: %28

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Examples of 646

Computer Account Changed:
Account Enabled.
Target Account Name:COMP1$
Target Domain:ELMW2
Target Account ID:comp1
Caller User Name:Administrator
Caller Domain:ELMW2
Caller Logon ID:(0x0,0x12D622)

Windows Server 2003 adds these fields
Changed Attributes:
Sam Account Name:-
Display Name:-
User Principal Name:-
Home Directory:-
Home Drive:-
Script Path:-
Profile Path:-
User Workstations:-
Password Last Set:-
Account Expires:-
Primary Group ID:-
Old UAC Value:-
New UAC Value:-
User Account Control:-
User Parameters:-
Sid History:-
Logon Hours:-
DNS Host Name:-
Service Principal Names:-

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