Windows System Event: 4821

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System Event » Windows System Event: 4821

Event ID 4821: A Kerberos service ticket was denied because the user, device, or both does not meet the access control restrictions.

Description A Kerberos service ticket was denied because the user, device, or both does not meet the access control restrictions.This event is generated every time access is requested to a resource such as a computer or a Windows service.
Category Account logon
Subcategory Kerberos service ticket operation

The event logs the following information:

Account information
  • Account Name
  • Account Domain
  • Logon ID
Device information
  • Device name
Service information
  • Service name
  • Service ID
Authentication policy information
  • Silo name
  • Policy name
Network Information
  • Client address
  • Client port
Additional information
  • Ticket information
  • Ticket encryption type
  • Failure code
  • Transit services


  • This event can be correlated with Windows logon events by comparing the Logon GUID fields in each event.
  • The logon event occurs on the machine that was accessed, which is often a different machine than the domain controller which issued the service ticket.
  • Ticket options, encryption types, and failure codes are defined in RFC 4120.

Event 4821 applies to the following operating systems:

  • Windows Server 2012 R2 and 8.1
  • Windows Server 2016 and 10

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