Account Management Event: 646

Active Directory Auditing Tool

The Who, Where and When information is very important for an administrator to have complete knowledge of all activities that occur on their Active Directory. This helps them identify any desired / undesired activity happening. ADAudit Plus assists an administrator with this information in the form of reports. In real-time, ensure critical resources in the network like the Domain Controllers are audited, monitored and reported with the entire information on AD objects - Users, Groups, GPO, Computer, OU, DNS, AD Schema and Configuration changes with 200+ detailed event specific GUI reports and email alerts.

Account Management » Event ID 646 - Computer Account Changed

Event ID 646 - Computer Account Changed

Event ID 646
Category Account management
Sub category Computer account management
Description A computer account was changed

When a computer account is changed, event ID 646 gets logged. 

This log data gives the following information:

Subject: User who performed the action Security ID
Account Name
Account Domain
Logon ID
New Account: Created computer Security ID
Account Name 
Account Domain
Attributes (of the changed account): 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
Allowed To Delegate To
Old UAC Value
New UAC Value
User Account Control:
  • Account Disabled
  • 'Password Not Required'
  • 'Workstation Trust Accout'
  User Parameters
SID History
Logon Hours
Additional Information:
  • Privileges

Why event ID 646 needs to be monitored?

  • Prevention of privilege abuse
  • Detection of potential malicious activity
  • Operational purposes like getting information on user activity like user attendance, peak logon times, etc.
  • Compliance mandates

Pro tip:

ADAudit Plus alerts and tracks critical activities such as creation, deletion or modification of user/group/computer, thus making Active Directory auditing much easier. 

Event 646 applies to the following operating systems:

  • Windows Server 2000
  • Windows 2003 and XP

Corresponding event ID for 646 in Windows Server 2008 and Vista is 4742