http://blogs.msdn.com/commerce/archive/2009/04/08/feedback-requested-removal-of-cs2000-cs2002-isapi-authorization-filter.aspxWhen we shipped Commerce Server 2007, we began supporting ASP.NET Authentication for SQL Authentication and ADFS for Windows Authentication. In fact, this became the preferred and directed method to handle site authentication for Commerce Server. Theen-USCommunityServer 2.1 SP1 (Build: 61025.2)