Mobile app(andriod) -> Middleware (Bluemix) -> Backend Server (.net)
As per the Bluemix(Adapter) logs I can see, Mobile App can access Adapter APIs but getting java.security.cert.CertificationException when accessing Backend Serve's APIs (https) from Adapter(Bluemix)
UnTrusted SSL certificate has been added in Backend Server. So, is there any configuration required to be done in Bluemix to access secured Backend APIs? OR should I have to add keystore files in Bluemix?

This document describes what needs to be done to connect to a backend over SSL , from a Java script adapter:
https://mobilefirstplatform.ibmcloud.com/blog/2017/01/17/SSL-connection-from-adapters/