I have a orchestration which is receive a request from local rest service then send request to another remote Rest Service then if the remote service returns a response succ
Actually you can't catch those kind of exception without some additional line of codes :) because when you catch this exception at the orchestration level the WCF adapter has already encapsulated it and you can't access to the error code, check this article for handling those kind of errors http://social.technet.microsoft.com/wiki/contents/articles/16625.biztalk-server-rest-services-error-handling.aspx