in orchestration
ReqMsg(SOAP.ClientConnectionTimeout)=600000 // for 10 minutes
web.config or machine.config
<httpRuntime executionTimeout="1200"></httpRuntime>
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When using the MessageAssignment orchestration shape, if the message you are using has not been instantiated by a map or a port then you must manually instantiate the message:
ReqMsg = new System.Xml.XmlDocument();
//Now that the message has been instantiated it can be used.
ReqMsg(SOAP.ClientConnectionTimeout)=600000
for send port retry count set to 0
Ref: http://kbalertz.com/952567/requests-requests-BizTalk-Server-BizTalk-Server.aspx
http://msdn.microsoft.com/en-us/library/dd297484%28BTS.10%29.aspx
http://winterdom.com/2005/07/webservicecalltimeoutinbiztalk