Unified Communications Diagnostics 8.6.3

Table 4. Exchange 2013 CAS panel.
Component	Description
Front-End Transport Service	Shows the CPU Usage for the Front-End Transport Service (in %). The Transportation Role is split into two parts in Exchange 2013: Front-End Transport Service (located in the Client Access Server) and Transport Service (located in the Mailbox Server).
SMTP Inbound Connections	Shows the total number of inbound SMTP connections established by other SMTP hosts to this Exchange server. The number of connections represents the sum of all SMTP inbound connections from all remote domains to SMTP Receive Connectors on this Exchange 2013 server. SMTP is the standard protocol for Internet Mail. Exchange 2013 has an updated SMTP protocol and transport stack that does not depend on IIS. Exchange 2013 uses SMTP protocol for server-to-server message delivery within the same Active Directory site or Routing Group, between different Exchange Organizations, and when transferring mail to other email systems.
HTTP/Proxy Outstanding Requests	Shows the quantity of concurrent outstanding proxy requests for the Microsoft Exchange HTTP Proxy access.
Avg. Authentication Latency (ms)	Shows the average time spent in authenticating CAS requests in the past 200 samples.
Avg. RPC Latency (sec)	Shows the average latency in seconds of RPC requests. Average is calculated over all RPCs since exrpc32 was loaded.
IIS Service	Shows the CPU Usage for World Wide Web Publishing Service (in %). Exchange Server depends on the Microsoft Internet Information Services (IIS) in order to connect using HTTP. To keep email communication flowing, the IIS Service must be running properly. If the IIS Service (W3SVC) is down, some Exchange 2013 specific functionality such as ECP, EWS, Autodiscover, ActiveSync, OWA, and PowerShell will be affected.
SMTP Outbound Connections	Shows the current number of outbound SMTP connections to other SMTP hosts. The number of connections represents the sum of all SMTP outbound connections from SMTP Send Connectors on this Exchange 2013 server to all remote SMTP domains. SMTP is the standard protocol for Internet Mail. Exchange 2013 has an updated SMTP protocol and transport stack that does not depend on IIS. Exchange 2013 uses SMTP protocol for server-to-server message delivery within the same Active Directory site or Routing Group, between different Exchange Organizations, and when transferring mail to other email systems.
Users at Max Concurrency	Shows the total quantity of the users that attain Maximum Connections Limitation.
Proxy Failure Rate	Shows the percentage of the connectivity related to the failures between the CAS servers and MBX servers in the past 200 samples.
LDAP Search Time (ms)	Shows the time to send an LDAP search request and receive a response (in milliseconds).
Inbound Connectors	Shows the number of SMTP Receive connectors on this Exchange 2013 server that can accept mail from other SMTP servers. SMTP Receive Connectors provide the ability for a Mailbox role to receive email from any other SMTP server on the Internet, other Exchange Server 2013 Mailbox server roles, or other Exchange Server 2013 organizations. Exchange 2013 Servers can have multiple SMTP Receive connectors with different parameters for availability or performance reasons.
Outbound Connectors	Shows the number of SMTP Send connectors on this Exchange 2013 server that can send connections to other SMTP servers. An SMTP Send connector is required for an Exchange Server 2013 to send any SMTP email to other SMTP server on the Internet or to any SMTP server within the same Exchange Server organization. More than one Exchange Mailbox server can use a Send Connector for routing purposes. The Send Connector properties in the Exchange Management Console show which Exchange Mailbox Servers in the same site can use this Send Connector through which to route mail.

Mailbox Server (MBX) Transport Panel

The Mailbox Server (MBX) Transport panel groups components that identify the status of the various transport queues on the mailbox server on this Exchange 2013 server. The Transportation Role is split into two parts in Exchange 2013: Mailbox Transport service and Front-End Transport service.

The Mailbox Transport service runs on all Exchange 2013 Mailbox servers and consists of two separate services:

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Mailbox Transport Delivery service receives the SMTP messages from the Transport service which is running on the local Exchange 2013 Mailbox server or other Exchange 2013 Mailbox servers.

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Mailbox Transport Submission service, which runs on the Exchange 2013 Mailbox server, that connects to a local mailbox database using RPC to retrieve messages.

Table 5. Exchange 2013 mailbox server transport panel
Component	Description
Inbound Connections	Shows the total number of inbound SMTP connections established by other SMTP hosts to this Exchange server. The number of connections represents the sum of all SMTP inbound connections from all remote domains to SMTP Receive Connectors on this Exchange 2013 server. SMTP is the standard protocol for Internet Mail. Exchange 2013 has an updated SMTP protocol and transport stack that does not depend on IIS. Exchange 2013 uses SMTP protocol for server-to-server message delivery within the same Active Directory site or Routing Group, between different Exchange Organizations, and when transferring mail to other email systems.
Outbound Connections	Shows the current number of outbound SMTP connections to other SMTP hosts. The number of connections represents the sum of all SMTP outbound connections from SMTP Send Connectors on this Exchange 2013 server to all remote SMTP domains. SMTP is the standard protocol for Internet Mail. Exchange 2013 has an updated SMTP protocol and transport stack that does not depend on IIS. Exchange 2013 uses SMTP protocol for server-to-server message delivery within the same Active Directory site or Routing Group, between different Exchange Organizations, and when transferring mail to other email systems.
EWS Response Time	Shows the average response time for the Exchange Web Services (EWS) which is running on the Exchange 2013 Mailbox Server. The Exchange Web Services (EWS) provides the functionality to enable Client Applications to communicate with the Exchange 2013 servers. It also provides the access to much of the same data, which is made available through the Microsoft Office Outlook.
Transport Service	Shows the CPU usage for the Exchange Transport Service (in %). The Transport service runs on all Exchange 2013 Mailbox servers and is similar to the Hub Transport server role in previous Exchange versions. This service handles all the inside and outside SMTP mail flow for the entire Exchange 2013 organization. Each SMTP message must be categorized and content-inspected in the Transport service before it can be routed and delivered. After the messages are categorized, they are put in a delivery queue to await delivery to the destination. Unlike Exchange 2010 or earlier, the Transport service does not communicate with mailbox databases directly. That task is handled by the Mailbox Transport service. The Transport service routes SMTP messages between the Front-End Transport service which runs on all CAS servers, the Transport service, and the Mailbox Transport service
Transport Delivery Service	This shows the CPU usage for the Exchange Mailbox Transport Delivery service (in %). The Exchange Mailbox Transport Delivery service runs on all Exchange 2013 Mailbox servers. It is a separate service from the Mailbox Transport service. The Mailbox Transport Delivery service receives the SMTP messages from the Transport service on the local Exchange 2013 Mailbox servers or on the other Exchange 2013 Mailbox servers. The service uses an Exchange remote procedure call (RPC) to connect to a local mailbox database to deliver the messages. The Mailbox Transport Delivery service does not queue messages locally.
ActiveSync Pending	Shows the number of pending Sync commands on the Exchange 2013 Mailbox Server currently.
ActiveSync Request Time	Shows the average request time for the ActiveSync on this Exchange 2013 Mailbox Server. This Average Request Time is the average time that elapsed, in milliseconds, waiting for a request to be completed in this Mailbox Server.
Transport Submission Service	Shows the CPU usage for the Exchange Mailbox Transport Submission Service (in %). The Exchange Mailbox Transport Submission service runs on all Exchange 2013 Mailbox servers. It is a separate service from the Mailbox Transport service. The Mailbox Transport Submission service uses an Exchange remote procedure call (RPC) to connect to a local mailbox database to retrieve messages. The service submits the messages over SMTP to the Transport service that is running on the local Exchange 2013 Mailbox server or on the other Exchange 2013 Mailbox servers. The service has access to the same routing topology information as the Transport service. The Mailbox Transport Submission service does not queue messages locally.
Unreachable Queue	Shows the number of messages in the transport unreachable queue on this Exchange 2013 server. The Unreachable Queue contains any messages that cannot be routed to their final destination.
Poison Queue	Shows the number of potentially harmful messages on this Exchange 2013 server. Messages that contain content that might be damaging to the Exchange Server system are by default delivered to this Poison Queue and suspended. If messages in this queue are deemed not harmful, message delivery can be resumed, and the message enters the Submission Queue.
Delivery Queue	Shows the number of items in the Transport Mailbox Delivery Queue on this Exchange server. The Mailbox Delivery Queue holds messages that are being delivered to mailbox recipients whose mailbox data is stored on a Mailbox Server Role located in the same site as this Transport server. The next hop for a message in this queue is the distinguished name of the destination mailbox store. A different mailbox delivery queue exists for each Mailbox server destination. Mailbox delivery queues are created as needed and automatically removed.
Submission Queue	Shows the number of items in the Submission queue. The Submission queue holds messages before they are consumed by the Categorizer which determines what to do with the messages based on information about the intended recipients. After the Submission queue, the Categorizer then routes the message to either a CAS Server role, another Mailbox server in a different AD Site, a mailbox on an Exchange server, or the Unreachable queue.

Mailbox Server (MBX) Information Store Panel

The Mailbox Server (MBX) Information Store Panel displays key operational metrics for the information store on this Exchange 2013 server. This information includes:

Table 6. Exchange 2013 mailbox server information store panel.

Component

Description

Public Folder

Shows the number of the public folder which are located in the Exchange 2013 Mailbox Server.

In order to take advantage of the high availability and the storage technologies of the mailbox database, Microsoft Exchange 2013 Public Folders have been modernized. The specially designed mailboxes have been used to store both the public folder content and the hierarchy in the Public Folder architecture. There's no a public folder database any more.

In Exchange 2013, the Public Folder replication uses continuous replication model.

The content mailboxes and the high availability for the hierarchy are provided by database availability group (DAG).

Public Folder Mailbox

Shows the number of the public folder mailboxes which are located on the Exchange 2013 Mailbox Server.

The Exchange 2013 Public folder mailboxes contain the information about the hierarchy for a public folder, and the actual content is contained in the Exchange 2013 public folder. When you create a public folder, the first public folder mailbox will become the master hierarchy mailbox. Public folder hierarchy mailbox subsequently created will become a secondary mailbox.

DAG

Shows the name of the Database Availability Group to which this Exchange 2013 server belongs. This is shown for informational purposes only. View the Mailbox Databases drilldown to see more information about the mailbox databases installed on this server.

Replication Service

Shows the Exchange 2013 Replication Service Status.

Store Worker Process

Shows the CPU Utilization of the Microsoft.Exchange.Store.Worker Service in Exchange 2013 Mailbox Server.

In Exchange 2013, the information store is now called Managed Store, which has two processes:

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Microsoft.Exchange.Store.Service.exe

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Microsoft.Exchange.Store.Worker.exe

Each database is running under its own process, which isolates the stores issues to a single database. Working with the Microsoft Exchange Replication service, Managed Store manages the mailbox databases and uses the Extensible Storage Engine (ESE) as the database engine. This architectural changes enable faster database failover and better physical disk failure handling.

Mailbox Counts

Shows the total number of mailboxes that reside in all mailbox stores. This is shown for informational purposes only.

Store Service Process

Shows the CPU Utilization of the Microsoft.Exchange.Store.Service Service in Exchange 2013 Mailbox Server.

In Exchange 2013, the information store is now called Managed Store, which has two processes as below:

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Microsoft.Exchange.Store.Service.exe

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Microsoft.Exchange.Store.Worker.exe

Mailbox Databases

Shows the percentage of disk space consumed by the mailbox stores on this server. This also shows how much of the server disk consumption is caused by mailbox store consumption versus other data.

Transaction Logs

Shows the total percentage of disk space consumed by the transaction logs on this server. It can be used to quickly assess how much server disk is consumed by transaction log data versus other data on the Exchange server.

OS/ Subsystem Panel

The Subsystem panel displays components that represent the health of important subsystem features. This information includes:

Table 7. Exchange 2013 subsystem panel.
Component	Description
CPU Usage	Shows the amount of CPU used on this Exchange 2013 server.
System Disk	Shows the percentage of disk usage for the Windows system disk on this Exchange 2013 server.
System Memory	Shows the amount of physical memory (RAM) Windows is using. Physical memory usage can normally remain close to the total amount of physical memory installed on the system unless the amount of physical memory exceeds the amount of virtual memory that Windows is using. Windows normally keeps some physical memory available for immediate use.
Ping Time	Shows the ping time (in milliseconds) from the client (UC Diagnostics) to the Exchange 2013 server.
Top CPU Consumer	Identifies the process that is consuming the most CPU on this Exchange 2013 server.
Top Memory Consumer	Identifies the process that is consuming the most memory on this Exchange 2013 server.

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Unified Communications Diagnostics 8.6.3 - User Guide

Client Access Server (CAS)

Mailbox Server (MBX) Transport Panel

Mailbox Server (MBX) Information Store Panel

OS/ Subsystem Panel