Migrating from Windows Server AppFabric Caching to ScaleOut StateServer®
Using the ASP.NET Session State Provider

ScaleOut StateServer’s session provider will automatically register for expiration events in order to fire a web application’s Session_End event in Global.asax. To prevent this registration and stop events from being delivered to Session_End, add the setting soss_RegisterForEvents with the value False to the application’s web.config file, as follows:

<configuration>
  <appSettings>
    <add key="soss_RegisterForEvents" value="False"/>
  </appSettings>
...
</configuration>