I exposed BizTalk Orchestration as a WCF Service and getting "response: (413) Request Entity Too Large." for request larger than 1 MB. I added "bindings" tag to web.config of service as below but no luck.
<bindings>
<basicHttpBinding>
<binding name="BasicHttpBinding_ITwoWayAsync" maxBufferPoolSize="2147483647" maxBufferSize="2147483647" maxReceivedMessageSize="2147483647" >
</binding>
</basicHttpBinding>
</bindings>
I restarted IIS and changed "Max Rec Message Size" setting of BizTalk receive location but no luck.