Hi, I am trying to extract a new field to spot unauthrorised certificate usage on a server.  Under event ID 4768, there is a "Certificate Information" heading followed by Certificate Issuer Name, Certificate Serial Number, and Certificate Thumbprint. Ideally, I want to extract the Certificate Thumbprint field so I can create an alert. But because the logs I have so far have empty Certificate Information fields, it's making it difficult to create an expression. Does anyone have ideas how to extract the Certificate Thumbprint field? Regards, Mark ... View more