Overview of Exchange 2016 services

 

Applies to: Exchange Server 2016

Topic Last Modified: 2017-10-20

During the installation of Exchange Server 2016, Setup runs a set of tasks that install new services in Microsoft Windows. A service is a background process that can be launched during the startup of the server by the Windows Service Control Manager. Services are executable files designed to operate independently and without administrative intervention. A service can run using either a graphical user interface (GUI) mode or a console mode.

All previous versions of Exchange included components that are implemented as services. Each Exchange server role includes services that are part of (or may be needed by) the server role to perform its functions. Note that some services only become active when specific features are used.

The sections in this topic describe the various services that are installed by Exchange 2016 on Mailbox servers and Edge Transport servers. For services that are labeled as optional, you can disable the service if you determine your organization doesn't need the functionality that's provided by the service.

The following table describes the Exchange services that are installed on Mailbox servers.

 

Service name Service short name Description and dependencies Default startup type Security context Dependencies Required or optional

Microsoft Exchange Active Directory Topology

MSExchangeADTopology

Provides Active Directory topology information to Exchange services. If this service is stopped, most Exchange services can't start.

Automatic

Local System

Net.TCP Port Sharing Service

Required

Microsoft Exchange Anti-spam Update

MSExchangeAntispamUpdate

Provides Exchange SmartScreen spam definition updates.

noteNote:
On November 1, 2016, Microsoft stopped producing spam definition updates for the SmartScreen filters in Exchange and Outlook. The existing SmartScreen spam definitions will be left in place, but their effectiveness will likely degrade over time. For more information, see Deprecating support for SmartScreen in Outlook and Exchange.

Automatic

Local System

Microsoft Exchange Active Directory Topology

Optional

Microsoft Exchange Compliance Audit

MSComplianceAudit

Provides Exchange auditing features.

Automatic

Local System

Microsoft Exchange Active Directory Topology

Required

Microsoft Exchange Compliance Service

MSExchangeCompliance

Provides a host for Exchange compliance services.

Automatic

Local System

Microsoft Exchange Active Directory Topology

Required

Microsoft Exchange DAG Management

MSExchangeDagMgmt

Provides storage and database layout management for Mailbox servers in database availability groups (DAGs).

Automatic

Local System

Microsoft Exchange Active Directory Topology

Net.TCP Port Sharing Service

Required

Microsoft Exchange Diagnostics

MSExchangeDiagnostics

Provides an agent that monitors Exchange server health.

Automatic

Local System

None

Required

Microsoft Exchange EdgeSync

MSExchangeEdgeSync

Replicates configuration and recipient data between the Mailbox server and Active Directory Lightweight Directory Services (AD LDS) on subscribed Edge Transport servers over a secure LDAP channel.

If you don't have any subscribed Edge Transport servers, you can disable this service.

Automatic

Local System

Microsoft Exchange Active Directory Topology

Optional

Microsoft Exchange Frontend Transport

MSExchangeFrontEndTransport

Proxies SMTP connections from external hosts to the Microsoft Exchange Transport service on Mailbox servers (the local server, or remote servers).

Automatic

Local System

Microsoft Exchange Active Directory Topology

Required

Microsoft Exchange Health Manager

MSExchangeHM

Part of managed availability that monitors the health of key components on the Exchange server.

Automatic

Local System

Windows Event Log

Windows Management Instrumentation

Required

Microsoft Exchange Health Manager Recovery

MSExchangeHMRecovery

Part of managed availability that attempts to recover unhealthy components on the Exchange server.

Automatic

Local System

Windows Event Log

Windows Management Instrumentation

Required

Microsoft Exchange IMAP4

MSExchangeIMAP4

Proxies IMAP4 client connections from the Client Access (frontend) services to the backend IMAP4 service on Mailbox servers. By default, this service isn't running, so IMAP4 clients can't connect to the Exchange server until this service is started.

If you don't have any IMAP4 clients, you can disable this service.

Manual

Local System

Microsoft Exchange Active Directory Topology

Optional

Microsoft Exchange IMAP4 Backend

MSExchangeIMAP4BE

Receives proxied IMAP4 client connections from the from the Client Access (frontend) IMAP4 service. By default, this service isn't running, so IMAP4 clients can't connect to the Exchange server until this service is started.

If you don't have any IMAP4 clients, you can disable this service.

Manual

Network Service

Microsoft Exchange Active Directory Topology

Optional

Microsoft Exchange Information Store

MSExchangeIS

Manages the mailbox databases on the server. If this service is stopped, mailbox databases on the server are unavailable.

Automatic

Local System

Microsoft Exchange Active Directory Topology

Remote Procedure Call (RPC)

Server

Windows Event Log

Workstation

Required

Microsoft Exchange Mailbox Assistants

MSExchangeMailboxAssistants

Performs background processing of mailboxes in mailbox databases on the server.

Automatic

Local System

Microsoft Exchange Active Directory Topology

Required

Microsoft Exchange Mailbox Replication

MSExchangeMailboxReplication

Processes mailbox moves and move requests.

Automatic

Local System

Microsoft Exchange Active Directory Topology

Net.TCP Port Sharing Service

Rquired

Microsoft Exchange Mailbox Transport Delivery

MSExchangeDelivery

Receives SMTP messages from the Microsoft Exchange Transport service (on the local or remote Mailbox servers) and delivers them to a local mailbox database using RPC.

Automatic

Network Service

Microsoft Exchange Active Directory Topology

Required

Microsoft Exchange Mailbox Transport Submission

MSExchangeSubmission

Receives RPC messages from a local mailbox database, and submits them over SMTP to the Microsoft Exchange Transport service (on the local or remote Mailbox servers).

Automatic

Local System

Microsoft Exchange Active Directory Topology

Required

Microsoft Exchange Notifications Broker

MSExchangeNotificationsBroker

Provides Exchange notifications to local and remote Exchange processes.

Automatic

Local System

Microsoft Exchange Active Directory Topology

Net.TCP Port Sharing Service

Required

Microsoft Exchange POP3

MSExchangePOP3

Proxies POP3 client connections from the Client Access (frontend) services to the backend IMAP4 service on Mailbox servers. By default, this service isn't running, so POP3 clients can't connect to the Exchange server until this service is started.

Manual

Network Service

Microsoft Exchange Active Directory Topology

Optional

Microsoft Exchange POP3 Backend

MSExchangePOP3BE

Receives proxied POP3 client connections from the from the Client Access (frontend) POP3 service. By default, this service isn't running, so POP3 clients can't connect to the Exchange server until this service is started.

Manual

Network Service

Microsoft Exchange Active Directory Topology

Optional

Microsoft Exchange Replication Service

MSExchangeRepl

Provides replication functionality for mailbox databases in a database availability groups (DAGs).

Automatic

Local System

Microsoft Exchange Active Directory Topology

Required

Microsoft Exchange RPC Client Access

MSExchangeRPC

Manages client RPC connections for Exchange.

Automatic

Network Service

Microsoft Exchange Active Directory Topology

Required

Microsoft Exchange Search

MSExchangeFastSearch

Provides indexing of mailbox content, which improves the performance of content search.

Automatic

Local System

Microsoft Exchange Active Directory Topology

Required

Microsoft Exchange Search Host Controller

HostControllerService

Provides deployment and management services for applications on the local Exchange server.

Automatic

Local System

HTTP Service

Requirerd

Microsoft Exchange Server Extension for Windows Server Backup

WSBExchange

Enables Windows Server Backup to back and restore Exchange server data.

Manual

Local System

None

Optional

Microsoft Exchange Service Host

MSExchangeServiceHost

Provides a service host for Exchange components that don't have their own services.

Automatic

Local System

Microsoft Exchange Active Directory Topology

Required

Microsoft Exchange Throttling

MSExchangeThrottling

Provides user workload management that limits the rate of user operations (formerly known as user throttling).

Automatic

Network Service

Microsoft Exchange Active Directory Topology

Required

Microsoft Exchange Transport

MSExchangeTransport

Provides SMTP server and transport stack.

Automatic

Network Service

Microsoft Exchange Active Directory Topology

Microsoft Filtering Management Service

Required

Microsoft Exchange Transport Log Search

MSExchangeTransportLogSearch

Provides remote search capability for transport log files (for example, message tracking).

Automatic

Local System

Microsoft Exchange Active Directory Topology

Optional

Microsoft Exchange Unified Messaging

MSExchangeUM

Provides Unified Messaging (UM) features: allows voice and fax messages to be stored in Exchange and gives users telephone access to email, voice mail, calendar, contacts, or an auto attendant. If this service is stopped, Unified Messaging isn't available.

If you don't use UM, you can disable this service.

Automatic

Local System

CNG Key Isolation

Microsoft Exchange Active Directory Topology

Optional

Microsoft Exchange Unified Messaging Call Router

MSExchangeUMCR

Redirects UM client connections from the Client Access (frontend) services to the backend Unified Messaging service on Mailbox servers.

If you don't use UM, you can disable this service.

Automatic

Local System

CNG Key Isolation

Microsoft Exchange Active Directory Topology

Optional

The following table describes the Exchange services that are installed on Edge Transport servers.

 

Service name Service short name Description Default startup type Security context Dependencies Required or optional

Microsoft Exchange ADAM

ADAM_MSExchange

Stores configuration data and recipient data on the Edge Transport server. This service represents the named instance of the Active Directory Lightweight Directory Services (AD LDS) that's automatically created by Exchange Setup.

Automatic

Network Service

COM+ Event System

Required

Microsoft Exchange Anti-spam Update

MSExchangeAntispamUpdate

Provides Exchange SmartScreen spam definition updates.

noteNote:
On November 1, 2016, Microsoft stopped producing spam definition updates for the SmartScreen filters in Exchange and Outlook. The existing SmartScreen spam definitions will be left in place, but their effectiveness will likely degrade over time. For more information, see Deprecating support for SmartScreen in Outlook and Exchange.

Automatic

Local System

Microsoft Exchange ADAM

Optional

Microsoft Exchange Credential Service

MSExchangeEdgeCredential

Monitors credential changes in Active Directory Lightweight Directory Services (AD LDS) and installs the changes on the Edge Transport server.

Automatic

Local System

Microsoft Exchange ADAM

Required

Microsoft Exchange Diagnostics

MSExchangeDiagnostics

Provides an agent that monitors Exchange server health.

Automatic

Local System

None

Required

Microsoft Exchange Health Manager

MSExchangeHM

Part of managed availability that monitors the health of key components on the Exchange server.

Automatic

Local System

Windows Event Log

Windows Management Instrumentation

Required

Microsoft Exchange Health Manager Recovery

MSExchangeHMRecovery

Part of managed availability that attempts to recover unhealthy components on the Exchange server.

Automatic

Local System

Windows Event Log

Windows Management Instrumentation

Required

Microsoft Exchange Service Host

MSExchangeServiceHost

Provides a service host for Exchange components that don't have their own services.

Automatic

Local System

Microsoft Exchange ADAM

Required

Microsoft Exchange Transport

MSExchangeTransport

Provides SMTP server and transport stack.

Automatic

Network Service

Microsoft Exchange ADAM

Required

Microsoft Exchange Transport Log Search

MSExchangeTransportLogSearch

Provides remote search capability for transport log files (for example, message tracking).

Automatic

Local System

Microsoft Exchange ADAM

Optional

 
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