If you have purchased and installed the Central Admin Server Option (CASO), you can perform IDR of the managed media servers in a CASO environment. To prepare recovery media for the managed media servers, you must run the Intelligent Disaster Recovery Preparation Wizard on the central administration server. The *.dr files are stored on the central administration server. During IDR recovery of a managed media server, all restore jobs are submitted from the central administration server. The central administration server will then send the restore jobs to the appropriate managed media server.