Well, in your case you can not easily promote that property.
You have a few options:
– Change the schema so it is only 1 to 1. Do not know if this is even an option or if it will break the adapter
– Write a custom pipeline component to promote it
– Use XPath inside your Orchestation (probably the easiest)
You can find samples of this here:
[url]http://www.biztalkgurus.com/Samples/XPath-Inside-Orchestration.html[/url]