Outbound Interface: Proxy to SOAP Interface

Dear PI Experts,

My scenario is : SAP(Proxy)----->PI------>SOAP external WebserviceSystem.(external to my client network).

In PI Dev, QA systems interface is working fine.

In Prod system while sending the data to third-party web service system in PI message status showing in success status in RWB but third party system did not receive the data.

Target system is external to my client.

I am using same process in D,Q,P .

SOAP Target URL is different for D,Q and P.

same proxy server using in SOAP Adapter because of target system is external to my client network.

Please can you suggest me on this issue.

Thanks,

Aadi