If an error results when you try to test the connection from an SAP or SAP HR Active Sync adapter to the SAP system, open a command window and run this command from your installation directory WEB-INF/lib:
java -jar sapjco.jar
The sapjco.jar command shows which version of the SAP Java Connector (JCO) is installed and whether the adapter is installed correctly. The command also returns the JavaTM Native Interface (JNITM) platform-dependent and the RFC libraries that communicate with the SAP system.
If these platform-dependent libraries are not found, consult the SAP documentation to find out how to correctly install the SAP Java Connector.