Accessing Microsoft hosted CRM 4 using web services

I'm trying to perform a proof of concept of integration with CRM 4.0 for a project we are designing. Rather than installing the trial version which would require setting up Active Directory as well, I setup a trial hosted version here: http://crm.dynamics.com/en-gb/trial-overview

I am trying to establish a web services connection but I am getting a 401 Unauthorised error. Some of the code samples I found involve using the DiscoveredService but I cannot add a web reference to this in Visual Studio as it doesn't find it. The asmx file is there 开发者_运维知识库when accessed in the web browser but there is only an Execute method init.

I suppose my question is: Can the hosted Microsoft CRM solution be accessed using the CRM web services?

Thanks for your help, John

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Absolutely, download the Microsoft CRM SDK. It contains code samples that are already set up to do this.