Microsoft Exchange Performance Counters

Microsoft Exchange Unified Messaging Performance Monitoring counters

There are many performance counters that can be used to maintain and troubleshoot a Microsoft Exchange Server 2010 Unified Messaging (UM) server. Unified Messaging performance counters are used to measure quantities of information or data for Unified Messaging based on the number, size, duration, and rate of data that's being requested or received. Object: MSExchangeUMPerformance

Counter Name	Description
Operations Between Five and Six Seconds
Operations Between Four and Five Seconds	Operations Between Four and Five Seconds is the number of all UM operations that took between 4 and 5 seconds to complete. This is the time during which a caller was waiting for UM to respond.
Operations Between Three and Four Seconds	Operations Between Three and Four Seconds is the number of all UM operations that took between 3 and 4 seconds to complete. This is the time during which a caller was waiting for UM to respond.
Operations Between Two and Three Seconds	Operations Between Two and Three Seconds is the number of all UM operations that took between 2 and 3 seconds to complete. This is the time during which a caller was waiting for UM to respond.
Operations over Six Seconds	Operations over Six Seconds is the number of all UM operations that took more than 6 seconds to complete. This is the time during which a caller was waiting for Unified Messaging to respond.
Operations under Two Seconds	Operations under Two Seconds is the number of all UM operations that took less than 2 seconds to complete. This is the time during which a caller was waiting for Unified Messaging to respond.