Recently a few people asked how to configure alerts for the metrics we recently published. Unfortunately, we cannot enable it on the metrics tile directly:
To setup metrics, in the Portal, go to Monitoring – Alerts (Preview) - Click "+ New Alert Rule".
Then follow the steps on the screen to create your new alert rule. First select a resource, then define a criteria, define alert details and define an action group. Then create the alert rule.
Note the newly created alert rule.