On the Agents page, for each agent in the agents list, a 
(alive) icon in the Status column indicates an agent is alive. A 
(not alive) icon indicates the agent is not responding, has timed out, or has been disabled.
At any time, you can test one or all agents to update the status list.
Checking the status of a single agent
Either Click the 
(test agent) button in the Status column in the agents list or click the button on the Agent Details page to test that agent.
Checking the status of a group of agents
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From the Filter drop-down menu, select the agent criteria.
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Click the
(test filtered agents) button in the Filtered Agents section of the page.After a few seconds, a
icon in the Status column appears to indicate an agent is alive. A icon indicates the agent is not responding or has timed out. -
If necessary, click the View Messages link in the Actions column to help you determine what the error icon means.
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Click the Agents tab to return to the agents list.