In the CRM SDK there is an example of how to create a dublett checker. It works fine but I would like to point out a few things.
- Perhaps a lead dubletthandler should also check for the existance of an account with the same name. It is only natural to check if the new lead might already be a customer.
- It cannot be used offline. Users should be notfiied of this or the function to create the entity should be disabled in offline mode.
CRM and SharePoint Consultant