I've been on a pretty serious WCF kick for the past few months and more and more I love it. I like even more how well BizTalk works with WCF. BizTalk is the application server you normally need to provide yourself to make WCF very useful. In Handling Binary Messages in Orchestrations I had mentioned that I used SQL Reporting Services via Web Services to run reports and do something with the output. As I had been experimenting with the solution I tried using both the SOAP Adapter and the WCF Adapter and found the WCF Adapter to be much more to my liking.
Using the WCF Http Basic binding you are able to call existing SOAP services but I did run into a slight problem with the SSRS services. These services require impersonation and by default WCF handles impersonation differently than ASMX in IIS did. At first I thought I needed to change the web.config on the reporting server, but eventually I stumbled onto Delegation and Impersonation with WCF on MSDN. More digging informed me what it was I needed to do, change the default client credentials (which I think was delegate) to impersonate. This lead me down a quite difficult path with WCF and configuration files that helped me understand the concepts more, but didn't really help me solve my issue. Fortunately after searching around the WCF Custom Adapter settings for a while I found the solution and it was a lot easier than hacking configuration files.
To make my life easier I used the basicHttpBinding as my Binding Type In the properties for the WCF Custom Adapter. Also in these properties, under the Behavior tab, select EndpointBehavior on the left. Then right click and go to the menu option Add Extension; selecting clientCredentials as the extension. Now go into the client credentials and under the Windows section there is a dropdown for allowedImpersonation. This is not only exactly what I needed, it looks like most of the WCF config options are here and best of all you can import and export to a single config file for the bindings, so if you're sick of doing WCF bindings by hand you can use BizTalk to do them with a nice GUI.
Soon I'll post about some things I like more about the WCF Adapter over the SOAP Adapter.
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