If you are using LiveCycle ES3 Digital Signatures to apply signatures to PDF documents using a timestamp (TSP) server you may encounter the following exception:
WARN [com.adobe.livecycle.signatures.pki.client.PKIException] (http-0.0.0.0-8080-7) Exception from transport package (in the operation : internalSendReceive)
Caused By: java.security.cert.CertificateException: Terminating SSL connection – The server is not trusted(Alerts.java174)
Caused By: Terminating SSL connection – The server is not trusted(PKISocketFactory.java255)
This exception will occur if the TSP server is configured to use SSL, i.e. with a HTTPS URL, and the relevant certificate from the TSP server is not found in the LiveCycle Trust Store. In this case the connection to the TSP server is ignored by LiveCycle as it is not configured correctly, and the signature on the PDF will be applied using the local time from the LiveCycle server machine.
You will need to import the certificate from the TSP server into the LiveCycle Trust Store (AdminUI > Settings > Trust Store Management > Certificates > Import).