The PDF document outlines the changes made to the design for K2 Runtime Services with emphasis on the integration of the component with other K2 components such as K2 SharePoint Workflow Integration, K2 SharePoint Events Integration and K2 InfoPath Integration. The implemented changes will alleviate certain Kerberos issues as the communications will no longer require a double hop from SharePoint to the K2 Server.  

The detailed PDF is available for download on the right hand menu.