http://developers.de/blogs/damir_dobric/archive/2012/11/20/sharepoint-workflow-instance-properties-mappedvariables-and-userstate.aspxWhen SharePoint activates the workflow in Workflow Manager, it basically send a REST message to Workflow Management Site. Workflow Management Site is the web site hosted in IIS at http:12291 and https:12290 . The code which is running on this site willenCommunityServer 2008 SP1 (Build: 30619.63)