Policy Change Event: 621

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The Who, Where and When information is very important for an administrator to have complete knowledge of all activities that occur on his Active Directory. This helps him 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 » Policy Change Event: 621

Event ID 621 – System Security Access Granted

Event ID 621
Category Policy Change
Type Success Audit

Event 621 is logged whenever logon rights are granted. The logon right can be of any type, such as "Access this computer from the network"or "Logon as a service". These rights are defined in the group policy objects, and applied by the computer, and thus, the "User Name" field gives the name of the same computer, instead of the name of the user who granted the right.

Note: This event is logged only when logon rights are granted; it is not triggered for other category rights.

This log data provides the following information:

  • Access Granted
  • Account Modified
  • Assigned By
  • User Name
  • Domain
  • Logon ID

Why does event ID 621 need to be monitored?

  • To ensure logon rights are restricted for certain accounts and users
  • To monitor activities performed by the SYSTEM account
  • To monitor activities of high value accounts
  • To detect anomalies and malicious activities
  • To ensure non-active accounts and external accounts are not used
  • To ensure only authorized and whitelisted accounts grant permissions
  • To look out for the activities carried out by restricted computers

Pro Tip:

ADAudit Plus helps you avoid the GPOs monitoring complexities with real-time pre-configured reports and auditing of the changes along with alerts within a Domain & OU. The advanced Group Policy settings real-time audit reports highlight the elusive change details, and also provide the old and new values of the modified attributes.

Event 621 applies to the following operating systems:

  • Windows Server 2000
  • Windows 2003 and XP

Corresponding event ID in Windows 2008 and Windows Vista is 4717.

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