DNS are not resolving ip behind DDirect name select.datascopeapi.extranet.reuters.biz correct, server will not be able to use internet/*.com.
Can you verify select.datascopeapi.extranet.reuters.biz/RestApi/v1 are correct and what DDirect ip are behind select.datascopeapi.extranet.reuters.biz ?
<entry key="DSS.Username" value="9001234" />
<entry key="DSS.Password" value="xxxxxxxx" />
<entry key="DSS.Endpoint" value="https://select.datascopeapi.extranet.reuters.biz/RestApi/v1" />
<entry key="DSS.WSDLEndpoint" value="https://hosted.datascopeapi.reuters.com/datascopeapi/v1/extractionservice.asmx?wsdl" />