http://ayende.comAyende @ RahienCopyright (C) Ayende Rahien 2004 - 2021 (c) 202660As far as WCF goes the product had a great vision, But I really dont know how much of it translated really into their implementation. If at all one thing that drives me crazy (about WCF), It is the WCF error reporting. Its awesome :-) Sendhil http://ayende.com/2720/wcf-microsoft-crm-dont-really-like-each-other#comment3http://ayende.com/2720/wcf-microsoft-crm-dont-really-like-each-other#comment3Mon, 20 Aug 2007 08:29:06 GMTIt's not surprising; in a way. The reason svcutil will use XmlSerializer instead of DataContracts is because the latter don't support xml attributes; as you can see your sample XML message is full of them :) Also, the other problem is that the CRM services are pretty generic; in fact, at least one of them is almost sql-like. As for the error problem, might be (though I haven't tried it) that you need to increase the MaxFaultSize; see http://blogs.msdn.com/drnick/archive/2007/08/07/increasing-the-maximum-fault-size.aspx http://ayende.com/2720/wcf-microsoft-crm-dont-really-like-each-other#comment2http://ayende.com/2720/wcf-microsoft-crm-dont-really-like-each-other#comment2Sun, 19 Aug 2007 12:19:06 GMTHmm I'm not sure, but I know the Microsoft CRM webservices are very complex. They are so complex that the Microsoft Biztalk Webservices adapter cannot handle the CRM Webservices. So for this problem they build a custom CRM Adapter. In the past I've used the CRM Webservices a lot. You have to know there's a lot possible, but also remember that not everything works the way you expect them to work. There is a lot of information in the CRM SDK. If I'm right there is a possibility to use only the collumns you need as a result. I think you can use the ColumnSet property from RetrieveRequest to lessen the collumns returned. http://ayende.com/2720/wcf-microsoft-crm-dont-really-like-each-other#comment1http://ayende.com/2720/wcf-microsoft-crm-dont-really-like-each-other#comment1Sun, 19 Aug 2007 09:51:36 GMT