The previous scenario might be used if you want to leverage the Managed Availability feature in Exchange 2013 which allows a health check per Exchange workload.

The process for scenario 2 is similar to the one described earlier. Only this time, a content rule will be created for each Exchange workload:
  • Outlook Web App (OWA)
  • Exchange Admin Center (EAC/ECP)
  • Exchange Web Services (EWS)
  • Outlook Anywhere (OA)
  • MAPI/HTTP (MAPI)
  • Offline Address Book (OAB)
  • Exchange ActiveSync (EAS)
  • Autodiscover (AutoD)