Synchronization process cannot run

In the Synchronization phase, the system is verifying that it is ready for synchronization. Typically, errors in this phase are caused by issues with certificates. When systems are registered, they exchange certificates. If a trust store (.ssotruststore) on one system is overwritten after being registered, the result is a certificate mismatch and an error.

Example error message in security_provisioning.log

Caused by: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: 
  PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: 
  unable to find valid certification path to requested target
              at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
                at sun.security.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1886)
                at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:276)
                at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:270)
                at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1341)
                at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:153)
                at sun.security.ssl.Handshaker.processLoop(Handshaker.java:868)
                at sun.security.ssl.Handshaker.process_record(Handshaker.java:804)
                at sun.security.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:1016)
                at sun.security.ssl.SSLSocketImpl.performInitialHandshake(SSLSocketImpl.java:1312)
                at sun.security.ssl.SSLSocketImpl.readDataRecord(SSLSocketImpl.java:882)
                at sun.security.ssl.AppInputStream.read(AppInputStream.java:102)
                at java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
                at java.io.BufferedInputStream.read(BufferedInputStream.java:254)
                at java.io.DataInputStream.readInt(DataInputStream.java:387)
                at com.lawson.security.server.AbstractDefaultEventSource.readMsgAbstract
                 DefaultEventSource.java:313)
                at com.lawson.security.server.AbstractDefaultEventSource.read(AbstractDefault
                 EventSource.java:274)
                ... 9 more

Check the keystores on LSF and Landmark to ensure that they match.