Steps:
Step 1 - Set a health rule
A. In order to receive an email alert when an app agent or machine agent is down, the user will need to set up a health rule from the Controller UI.

B. Set the health rule to affect application performance.

C. Use option SUM instead of VALUE and take 10 minutes of data to evaluate if the agent is down to avoid false alerts due to network delays or delayed packet.
Example:

Note: For machine agent availability, select the availability metric under Agent > machine.

Step 2 - Create an action to send an email when the Agent is down
A. From the Controller UI, create a new action.

B. Enter the email address that should receive the alert.

Step 3 - Create a policy and select the health rule on which the policy should be evaluated
A. From the Controller IU, create a new policy.

B. Select the email address.

More information:
For instructions on how to set up alerts to monitor the health status of your application, please visit the resources below: