I updated my vCenter to U3 and now some of my older hosts at 3.0.1 are disconnected and when I try to reconnect I get "Failed to install the VirtualCenter Agent Service." messages. I can't take any downtime with these hosts to upgrade them but we are in the process of migrating the guests off of them to 3.5 hosts. Is there an easy way to get these hosts back into vCenter?
