Web Service Provider: Response (Outbound Message) Resolution Order

The following table describes the resolution order while generating WS-Addressing headers for service first and WSDL first provider response messages.

WS-Addressing Header	Resolution Order
To (address and endpoint reference parameters)	ReplyTo header in the request message
MessageID	Automatically generated at runtime
RelatesTo (@RelationshipType)	Automatically generated at runtime
ReplyTo (address, endpoint reference parameters, and metadata)	Message addressing endpoint alias Message Addressing Properties/ReplyTo
FaultTo (address, endpoint reference parameters, and metadata)	Message addressing endpoint alias Message Addressing Properties/FaultTo
From (address, endpoint reference parameters, and metadata)	Message addressing endpoint alias Message Addressing Properties/From

Note:
The relevant message addressing endpoint alias from which the values for these WS-Addressing headers are picked up is the endpoint alias that is mapped to the address in the response map of the provider endpoint alias. For more information about response map, see Creating an Endpoint Alias for a Provider Web Service Descriptor for Use with HTTP/S.