http://blogs.msdn.com/b/eugeniop/archive/2010/05/24/windows-azure-architecture-guide-part-2-tailspin-surveys-authn-and-authz.aspxTailspin Surveys is a multitenant, SaaS solution, targeting many different customers. Some of these customers might be “enterprise” with “Big-IT” and are likely to demand advanced integration capabilities for identity (e.g. identity federation). Othersen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)