Event ID 18 — Privilege Attribute Certificate Configuration
Applies To: Windows Server 2008
The Kerberos Privilege Attribute Certificate (PAC) contains all of the group memberships for the security principal requesting access to a resource. This certificate is transferred to the client by using the Key Distribution Center (KDC).
|Product:||Windows Operating System|
|Message:||During TGS processing, the KDC was unable to verify the signature on the PAC from %1. This indicates the PAC was modified.|
This is a normal condition. No further action is required.