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System Availability Counters for Unified Messaging

Applies to: Exchange Server 2010

Topic Last Modified: 2009-10-10

There are many performance counters that can be used to maintain and troubleshoot a computer that's running Microsoft Exchange Server 2010.

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.

The following table provides a list of the system availability performance counters that can be used to monitor Unified Messaging.

System availability performance counters for Unified Messaging

Performance counter Performance object Description

% of Failed Mailbox Connection Attempts Over the Last One Hour

MSExchangeAvailability

% of Failed Mailbox Connection Attempts Over the Last One Hour is the percentage of mailbox connection attempts that failed in the last hour.

% of Inbound Calls Rejected by the UM Service over the Last Hour

MSExchangeAvailability

% of Inbound Calls Rejected by the UM Service Over the Last Hour is the percentage of incoming calls that were rejected by the Microsoft Exchange Unified Messaging service in the last hour.

% of Inbound Calls Rejected by the UM Worker Process Over the Last Hour

MSExchangeAvailability

% of Inbound Calls Rejected by the UM Worker Process Over the Last Hour is the percentage of incoming calls that were rejected by the UM Worker process in the last hour.

% of Messages Successfully Processed Over the Last Hour

MSExchangeAvailability

% of Messages Successfully Processed Over the Last Hour is the percentage of messages that were successfully processed by the Microsoft Exchange Unified Messaging service in the last hour.

% of Partner Voice Message Transcription Failures Over the Last Hour

MSExchange Availability

% of Partner Voice Message Transcription Failures Over the Last Hour is the percentage of partner voice message transcription failures in the last hour.

Call Answer Queued Messages

MSExchangeAvailability

Call Answer Queued Messages is the number of messages created and not yet submitted for delivery.

Calls Disconnected by UM on Irrecoverable External Error

MSExchangeAvailability

Calls Disconnected by UM on Irrecoverable External Error is the number of calls disconnected after an irrecoverable external error occurred.

Calls Disconnected by UM on Irrecoverable External Error/sec

MSExchangeAvailability

Calls Disconnected by UM on Irrecoverable External Error/sec is the number of calls disconnected after an irrecoverable external error occurred in the last second.

Calls Disconnected on Irrecoverable Internal Error

MSExchangeAvailability

Calls Disconnected on Irrecoverable Internal Error is the number of calls that were disconnected after an internal system error occurred.

Directory Access Failures

MSExchangeAvailability

Directory Access Failures is the number of times that attempts to access Active Directory failed.

Failed Mailbox Connection Attempts %

MSExchangeAvailability

Failed Mailbox Connection Attempts % is the percentage of failed attempts to connect to the Mailbox server.

Incomplete Signaling Information

MSExchangeAvailability

Incomplete Signaling Information is the number of calls for which the signaling information was missing or incomplete.

Maximum Calls Allowed

MSExchangeAvailability

Maximum Calls Allowed is the length of time, in seconds, that the server concurrently processed the maximum number of calls allowed.

Name TTSed

MSExchangeAvailability

Name TTSed is the number of times the system used Text-to-Speech (TTS) to create an audio version of the display name of a subscriber.

Queued OCS User Event Notifications

MSExchangeAvailability

Queued OCS User Event Notifications is the number of notifications that have been created and not yet submitted for delivery.

Spoken Name Accessed

MSExchangeAvailability

Spoken Name Accessed is the number of times the system retrieved the recorded name of a user.

Total Worker Process Call Count

MSExchangeAvailability

Total Worker Process Call Count is the number of calls handled by this UM worker process.

Worker Process Recycled

MSExchangeAvailability

Worker Process Recycled is the number of times a new UM worker process has been started.

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