General Performance Counters for Unified Messaging

Applies to: Exchange Server 2010 SP3, Exchange Server 2010 SP2

Topic Last Modified: 2009-12-08

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 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.

General Performance Counters

The following table provides a list of the general performance counters that can be used to monitor Exchange 2010 Unified Messaging.

General performance counters for Unified Messaging

Performance counter	Performance object	Description
% Successful Caller ID Resolutions	MSExchangeUMGeneral	% Successful Caller ID Resolutions is the percentage of caller IDs that were resolved successfully.
% Successful Extension Caller ID Resolutions	MSExchangeUMGeneral	% Successful Extension Caller ID Resolutions is the percentage of successful attempts to resolve caller IDs that contained no "@" or "+" signs and were of the same length as the dial plan's extension. This counter is used only for TelExtn dial plans.
Average Call Duration	MSExchangeUMGeneral	Average Call Duration is the average duration, in seconds, of calls since the service was started.
Average MWI Latency	MSExchangeUMGeneral	Average MWI Latency is the average time, in milliseconds, from the moment a voice mail event occurs and Unified Messaging receives confirmation from the IP gateway that the message was delivered. This average is calculated over the last 50 messages.
Average Recent Call Duration	MSExchangeUMGeneral	Average Recent Call Duration is the average duration, in seconds, of the last 50 calls.
Call Duration Exceeded	MSExchangeUMGeneral	Call Duration Exceeded is the number of calls that were disconnected because they exceeded the UM maximum call length. This number includes all types of calls, including fax calls.
Caller ID Resolutions Attempted	MSExchangeUMGeneral	Caller ID Resolutions Attempted is the number of caller ID resolutions that were attempted.
Caller ID Resolutions Succeeded	MSExchangeUMGeneral	Caller ID Resolutions Succeeded is the number of caller IDs that were resolved successfully.
Calls Disconnected by User Failure	MSExchangeUMGeneral	Calls Disconnected by User Failure is the total number of calls disconnected after too many user entry failures.
Current Auto Attendant Calls	MSExchangeUMGeneral	Current Auto Attendant Calls is the number of auto attendant calls that are currently connected to the UM server.
Current Calls	MSExchangeUMGeneral	Current Calls is the number of calls that are currently connected to the UM server.
Current Fax Calls	MSExchangeUMGeneral	Current Fax Calls is the number of fax calls that are currently connected to the UM server. Voice calls become fax calls after a fax tone is detected.
Current Play on Phone Calls	MSExchangeUMGeneral	Current Play on Phone Calls is the number of outbound calls initiated to play back messages.
Current Prompt Editing Calls	MSExchangeUMGeneral	Current Prompt Editing Calls is the number of logged on users who are editing custom prompts.
Current Subscriber Access Calls	MSExchangeUMGeneral	Current Subscriber Access Calls is the number of logged on subscribers who are currently connected to the UM server.
Current Unauthenticated Pilot Number Calls	MSExchangeUMGeneral	Current Unauthenticated Pilot Number Calls is the number of voice calls to the pilot number that have not yet been authenticated.
Current Voice Mail Calls	MSExchangeUMGeneral	Current Voice Mail Calls is the number of voice mail calls that are currently connected to the Unified Messaging server.
Delayed Calls	MSExchangeUMGeneral	Delayed Calls is the number of calls that experienced one or more delays longer than 2 seconds.
Extension Caller ID Resolutions Attempted	MSExchangeUMGeneral	Extension Caller ID Resolutions Attempted is the number of attempts to resolve caller IDs that contained no "@" or "+" signs and were of the same length as the dial plan's extension. This counter is used only for TelExtn dial plans.
Extension Caller ID Resolutions Succeeded	MSExchangeUMGeneral	Extension Caller ID Resolutions Succeeded is the number of successful attempts to resolve caller IDs that contained no "@" or "+" signs and were of the same length as the dial plan's extension. This counter is used only for TelExtn dial plans.
OCS User Event Notifications	MSExchangeUMGeneral	OCS User Event Notifications is the total number of OCS user event notifications that occurred since the service was started.
Total Calls	MSExchangeUMGeneral	Total Calls is the number of calls answered or placed since the service was started. Transfers are not included.
Total Calls per Second	MSExchangeUMGeneral	Total Calls per Second is the number of new calls that have arrived in the last second.
Total Play on Phone Calls	MSExchangeUMGeneral	Total Play on Phone Calls is the total number of Play on Phone calls that have been initiated since the service was started.
User Response Latency	MSExchangeUMGeneral	User Response Latency is the average response time, in milliseconds, for the system to respond to a user request. This average is calculated over the last 25 calls. This counter is limited to calls that require significant processing.