[quote user="Anonymous"]Play nicely now……
So, just to recap. I can use the http adapter in Biztalk 06 to send a message via https (post) directly to the Suppliers https//server??
[/quote]
Yes, presumably you can use that transport. It requires coordination on both sides. I have never done it. He has to have the server application to receive the file and use it. There would usually be a response document in this handshake, telling you that the complete file was transferred.
Basically what you are asking is "can I roll my own https transport?" and the answer is yes. Especially if you can write the application on your end and the supplier's end.
Because of the application conventions required for reliability, AS2 is the preferred standardized https transport adaptor. Here is a "free" one (whatever free means) http://www.freeas2.com/
Let us know how it goes.