http://developers.de/blogs/damir_dobric/archive/2012/05/17/windows-azure-web-role-session-affinity-sticky-sessions.aspxWhen working with sessions in Web Applications you have consider clustered environment. That means that there will be some Load Balancer in from of  server which host your application. In this cases that means that every incoming request can be routedenCommunityServer 2008 SP1 (Build: 30619.63)