A combination of settings across WCF analytic tracing, workflow tracking, and the Event Collector service that define the amount and types of monitoring information that are collected and stored at a given scope in IIS.- Windows Server AppFabric predefines five monitoring levels: Off, ErrorsOnly, HealthMonitoring, EndToEndMonitoring, and Troubleshooting. - When you customize these configuration settings to fall outside a predefined level, Windows Server AppFabric considers your level to be Custom.”