The current Alert Manager will re-trigger alerts every 10 days. Any Alert that is active for this time will have their Actions re-triggered automatically. The Alert Manager will send the same events as any new Alert, but we do not track how many times it has re-triggered.
To change the limit update the following app setting value within the AlertingEngine.exe.config file and restart Alerting Engine service:
<add key="AutoClearAlertIntervalInMinutes" value="14400" />
Max allowed value of this setting in minutes is 129599 - which is about 90 days.