I get SSL warning as the SSL connections are established from the server. We are connecting to the load balancer IP using https  (***.***.***.***)( which is different from the certificate details we have  ). The certificates are generated for the servers .

"Failed to get metadata "

Metadata not available

Failed to get metadata from "https://_________?wsdl".

Unable to download metadata from "https://_________________?wsdl" using WS-Metadata Exchange. (System.InvalidOperationException) Metadata contains a reference that cannot be resolved: 'https://_____?wsdl'. (System.ServiceModel.Security.SecurityNegotiationException) Could not establish trust relationship for the SSL/TLS secure channel with authority '______'. (System.Net.WebException) The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel. (System.Security.Authentication.AuthenticationException) The remote certificate is invalid according to the validation procedure.

Any Idea how to solve the above error ?

This doesn't look like an actual problem.  Not all endpoints publish metadata.

Have you asked the owner of the service of metadata is even available?