Event ID - 4770

Event Id4770
SourceMicrosoft-Windows-Security-Auditing
DescriptionA Kerberos service ticket was renewed.

Account Information:
      Account Name:<Account Name>
      Account Domain:<Domain name>     

Service Information:
      Service Name:<Service Name>
      Service ID: <Service ID>     

Network Information:
      Client Address:<Client Address>
      Client Port: <Client Port>     

Additional Information:
      Ticket Options:<Ticket Options>
      Ticket Encryption Type:<Ticket Encryption Type>     

Event InformationCause :
This event is logged when a Kerberos service ticket was renewed.
Kerberos limits how long a ticket is valid. If a ticket expires when the user is still logged on, Windows automatically contacts the domain controller to renew the ticket which triggers this event.
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