[CMS] How do I know Altiris Agent is offline?

Hello

Always wondering how can I confirm that an altiris agent is actually offline or has been "clean" from the managed computer?

I've managed to resolved this issue by checking the time of last configuration, last inventory sent, and calculating a period of time offline, so I can delete manually later.

Is there a way to see if the agent is offline or uninstalled in real time?

Thanks everyone!