I'm sending request with iSipConnection->SendRequestL(requestElements,myProfile) where iSipConnection is a CSIPConnection object, requestElements is a CSIPRequestElements object describing the request and myProfile includes information about registration.
This give me as result:
MESSAGE sip:destinationIP SIP/2.0
Can I change the request-line to:
MESSAGE sip:proxyIP SIP/2.0 ???