Dear,
I didn’t get your question
what i understood is that
The acknowledgement you want to send to client is final ack and after that you need to perform some internal steps.
then you can send when you get from the third party.
Or
before sending the main response you need to send an ack first to first party and then again you will send response when you get from third party.
else you need to send revert back HTTP success response to client when message reach to EAI system successfully.
use Service:pub_flow_setResponse,pub_flow_setResponseCode,pub_flow_setResponseHeader
so both time you can show either its ack or final response.
please elaborate more what things you want and when.
#Integration-Server-and-ESB#webMethods