Microsoft Exchange Performance Counters

Microsoft Exchange Unified Messaging General Performance 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 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: MSExchangeUMGeneral

Counter Name	Description
% Successful Caller ID Resolutions
% Successful Extension Caller ID Resolutions	% 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	Average Call Duration is the average duration, in seconds, of calls since the service was started.
Average MWI Latency	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	Average Recent Call Duration is the average duration, in seconds, of the last 50 calls.
Call Duration Exceeded	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	Caller ID Resolutions Attempted is the number of caller ID resolutions that were attempted.
Caller ID Resolutions Succeeded	Caller ID Resolutions Succeeded is the number of caller IDs that were resolved successfully.
Calls Disconnected by User Failure	Calls Disconnected by User Failure is the total number of calls disconnected after too many user entry failures.
Current Auto Attendant Calls	Current Auto Attendant Calls is the number of auto attendant calls that are currently connected to the UM server.
Current Calls	Current Calls is the number of calls that are currently connected to the UM server.
Current Fax Calls	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	Current Play on Phone Calls is the number of outbound calls initiated to play back messages.
Current Prompt Editing Calls	Current Prompt Editing Calls is the number of logged on users who are editing custom prompts.
Current Subscriber Access Calls	Current Subscriber Access Calls is the number of logged on subscribers who are currently connected to the UM server.
Current Unauthenticated Pilot Number Calls	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	Current Voice Mail Calls is the number of voice mail calls that are currently connected to the Unified Messaging server.
Delayed Calls	Delayed Calls is the number of calls that experienced one or more delays longer than 2 seconds.
Extension Caller ID Resolutions Attempted	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	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	OCS User Event Notifications is the total number of OCS user event notifications that occurred since the service was started.
Total Calls	Total Calls is the number of calls answered or placed since the service was started. Transfers are not included.
Total Calls per Second	Total Calls per Second is the number of new calls that have arrived in the last second.
Total Play on Phone Calls	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	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.