In this article I want to provide a quick guide, about how to modify the xHTML F(orm) B(ased) A(uthentication) page the client will receive, when it is connecting to a site published with FBA through ISA server 2006 using a mobile Client, e.g. running Windows Mobile. Every time a client connects to the ISA server FBA site ISA server will check the HTTP Header Field User-Agent. Based on the inform