Hi Markus, If you're on version 1.5+ you could have a control project that ran multiple CruiseServerControl tasks to shut down all the projects from one click http://confluence.public.thoughtworks.org/display/CCNET/CruiseServer+Control+Task
There is the pain of setting up the 50+ tasks initially, but it could be more practical in the end...the control project could just be scheduled to shut everything down 5 minutes before your source VM is taken offline. Cheers, Jay
