The SAP Basis Component version is not properly evaluated since 750 into the SAP R3 java connector plug-in.
Running the BAPI_HELPVALUES_GET function module and reading resulting entries from the HELPVALUES table;
We are expecting to find a "SAPKB" patch name and its release but since 750 version there is no more Help Values Patch - SAPKB.
As the SAP Basis Component version is not evaluated as it should be, the connector works as for the old versions and converts the password to uppercase.
This is a workaround.
As the calculated SAP basis version is NOT equal to or higher than 700 (due to a wrong calculation in this case) then the SAP R3 java connector plug-in can consider the convertPasswordToUpperCase flag.
So copy the SAMPLE.connector.xml to connector.xml into the <Connector Server Home>\jcs\conf\override\sap folder and
modify the <Connector Server Home>\jcs\conf\override\sap\connector.xml file to change the flag from true to false as follows:
Then restart the JCS service.