elasticsearch endpoint is throwing certificate error

Elasticsearch endpoint is throwing error (see below) when trying to reach the elasticearch endpoint through the istio virtual service. The enforcement of istio authpolicies, peerauths work that was done previously may require additional configuration changes for elasticsearch to work alongside the mtls istio-proxy.

upstream connect error or disconnect/reset before headers. retried and the latest reset reason: remote connection failure, transport failure reason: TLS_error:|268435581:SSL routines:OPENSSL_internal:CERTIFICATE_VERIFY_FAILED:TLS_error_end:TLS_error_end