Monitoring is a key component for any successful deployment of Exchange. In previous releases, we invested heavily in developing a correlation engine and worked closely with the System Center Operations Manager (SCOM) product group to provide a comprehensive alerting solution for Exchange environments.
Continue at source (MSExchangeTeam Blog):
http://blogs.technet.com/b/exchange/archive/2012/09/21/lessons-from-the-datacenter-managed-availability.aspx
Until later,
Henrik Walther