Microsoft Exchange Performance Counters

Microsoft Exchange Unified Messaging Performance and Scalability counters

The following table provides information about performance counters that are used by the Unified Messaging (UM) server role in Microsoft Exchange Server 2010. You can use Performance Monitor (perfmon.exe) to monitor these counters. For more information, see Performance Monitor Getting Started Guide. For information about other counters relevant to Exchange 2010, see Performance and Scalability Counters and Thresholds. Object: MSExchangeUMAvailability

Counter Name Description
Counter Name: % of Failed Mailbox Connection Attempts Over the Last Hour Description: Shows the percentage of mailbox connection attempts that failed in the last hour.
Counter Name: % of Inbound Calls Rejected by the UM Service Over the Last Hour Description: Shows the percentage of inbound calls that were rejected by the Microsoft Exchange Unified Messaging service over the last hour.
Counter Name: % of Inbound Calls Rejected by the UM Worker Process Over the Last Hour Description: Shows the percentage of inbound calls that were rejected by the UM worker process over the last hour.
Counter Name: % of Messages Successfully Processed Over the Last Hour Description: Shows the percentage of messages that were successfully processed by the Microsoft Exchange Unified Messaging service over the last hour.
Counter Name: % of Partner Voice Message Transcription Failures Over the Last Hour Description: Shows the percentage of voice messages for which transcription failed in the last hour.
Counter Name: Calls Disconnected by Callers During UM Audio Hourglass Description: Shows the number of calls during which the caller disconnected while Unified Messaging was playing the audio hourglass tones.
Counter Name: Calls Disconnected on Irrecoverable Internal Error Description: Shows the number of calls disconnected after an internal system error occurred.
Counter Name: Directory Access Failures Description: Shows the number of times that attempts to access Active Directory failed.
Counter Name: Operations over Six Seconds Description: Shows the number of all UM operations that took more than six seconds to complete. This is the time during which a caller was waiting for UM to respond.
Counter Name: Total Inbound Calls Rejected by the UM Service Description: Shows the total number of inbound calls that were rejected by the Microsoft Exchange Unified Messaging Service since the service was started.
Counter Name: Total Inbound Calls Rejected by the UM Worker Process Description: Shows the total number of inbound calls that were rejected by the UM Worker process since the service was started.