CA does not have any options to have the Coordinator force an agent service to start.
If an agent goes into an inactive state, there are 2 settings found under the Coordinator Configuration section of the Administration Tasks that can be used to control agents that go inactive:
- The "Agent goes offline after being inactive for" option allows you to specify the amount of time an agent must be inactive before the coordinator marks it as inactive. By default, the coordinator marks an agent as inactive when it has not received any updates from the agent for 30 minutes
- The "Coordinator should try to restart agent service if an agent goes offline" option will have the Coordinator try to restart the agent service before it marks it as inactive.
Please note, these 2 options cannot help in a situation when the agent service has been stopped.