Microsoft Exchange Performance Counters

Microsoft Exchange Unified Messaging Call Answering 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 are used to measure quantities of information or data for Unified Messaging and are based on the number, size, duration, and rate of data that's being requested or received. Object: MSExchangeUMCallAnswering

Counter Name	Description
Average Greeting Size
Average Recent Voice Message Size	Average Recent Voice Message Size is the average size, in seconds, of the last 50 voice messages that have been left for subscribers.
Average Time Taken for Call Answering Rule Evaluations	Average Time Taken for Call Answering Rule Evaluations is the average time it takes to determine if one or more call answering rules apply to a call answering call.
Average Voice Message Size	Average Voice Message Size is the average size, in seconds, of voice messages left for subscribers.
Call Answering Calls	Average Voice Message Size is the average size, in seconds, of voice messages left for subscribers.
Call Answering Escapes	Call Answering Escapes is the number of times a caller pressed the * key to connect to another user instead of leaving a message.
Call Answering Missed Calls	Call Answering Missed Calls is the number of times a diverted call was dropped without a message being left.
Call Answering Protected Voice Messages	Call Answering Protected Voice Messages is the total number of protected voice messages that were submitted because calls were answered on behalf of subscribers.
Call Answering Voice Message Protection Failures	Call Answering Voice Message Protection Failures is the total number of voice messages, submitted because calls were answered on behalf of the subscribers, for which the attempt to apply protection failed.
Call Answering Voice Messages	Call Answering Voice Messages is the total number of voice messages that were submitted for delivery because the calls were answered on behalf of subscribers.
Calls Disconnected by Callers During UM Audio Hourglass	Calls Disconnected by Callers During UM Audio Hourglass is the number of calls during which the caller disconnected while Unified Messaging was playing the audio hourglass tones.
Calls Disconnected by UM on Irrecoverable External Error	Calls Disconnected by UM on Irrecoverable External Error is the number of calls that have been disconnected after an irrecoverable external error occurred.
Calls Without Personal Greetings	Calls Without Personal Greetings is the number of diverted calls received for subscribers that did not have recorded greeting messages.
Diverted Extension Not Provisioned	Diverted Extension Not Provisioned is the number of calls received for which the diverted extension supplied with the call is not a UM subscriber extension.
Fetch Greeting Timed Out	Fetch Greeting Timed Out is the number of diverted calls for which the subscriber’s personal greeting could not be retrieved within the time allowed.
Total Calls to Subscribers with One or More Call Answering Rules Configured	Total Calls to Subscribers with One or More Call Answering Rules Configured evaluates calls to determine whether any call answering rules should be applied.
Total Number of Call Answering Rules Calls	Total Number of Call Answering Rules Calls is the total number of calls that fulfill the conditions of at least one call answering rule. The rule is subsequently invoked to handle the call.
Total Number of Timed-out Call Answering Rule Evaluations	Total Number of Timed-out Call Answering Rule Evaluations is the total number of calls for which call answering rules weren't applied because the system timed out. As a result, the calls were answered using the Exchange 2007 UM voice mail behavior.