HI
That looks like you may have enabled the health monitoring agent collection and configured some alerts
you should check the dsm policy under this to see what was configured
- Domain/Control Panel/Configuration/Configuration Policy/Default Computer Policy/DSM/Health Monitoring/
you can verify if this is enabled under" Enable Health Monitoring "
That folders purge policy should be controlled by this policy setting
- Domain/Control Panel/Configuration/Configuration Policy/Default Computer Policy/DSM/Health Monitoring/Alert Collector
Alert Purge Maximum Age by default it is set to 60 days
Hope this is helpful
Joe