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Client protocol management

 

Applies to: Exchange Server 2013

Topic Last Modified: 2012-10-05

Management of the client protocols of Exchange ActiveSync, Outlook Web App, POP3, IMAP4, the Autodiscover service, Exchange Web Services, and the Availability service occurs in three different areas: the Exchange Administration Center (EAC), the Exchange Management Shell, and Internet Information Services (IIS) Manager. The settings that are managed in each location vary per client protocol.

Most of the settings that affect which Outlook Web App features are available to users can be set on the Outlook Web App virtual directory or can be configured in an Outlook Web App mailbox policy. By using Outlook Web App mailbox policies, you can define the features available to individual users. Mailbox policy settings override virtual directory settings. For more information on managing Outlook Web App, see Outlook Web App.

In Exchange 2010, all client access protocols were implemented and managed on a single server role, the Client Access server role. Management of the protocols was performed on a single instance of IIS, there was a single virtual directory object in Active Directory for each client protocol, and a single set of cmdlets were used to configure the virtual directory.

In Exchange 2013, the client protocol management for Exchange ActiveSync is split between the Client Access server and the Mailbox server. Because of this architecture change, you can run different virtual directory management tasks on both the Client Access server and the Mailbox server. If these two servers aren’t installed on the same physical computer, the parameters that you use with the virtual directory cmdlets will change based on the server role on which you are running them.

For more information about the architecture changes in Exchange 2013, see What's new in Exchange 2013.

There are two types of settings that can be applied to the Exchange ActiveSync virtual directory:

  • Settings applicable to the mailbox session

  • Settings applicable to the server and the virtual directory

The settings that are applicable to the mailbox session are user session settings. When a user connects to a Client Access server, the connection is proxied to the Mailbox server that contains the user’s mailbox. A unique identifier of the virtual directory is included with the proxied request. The Mailbox server then retrieves the virtual directory settings from Active Directory and applies them to the session. The virtual directory settings are cached on the Mailbox server to improve performance.

If the connection is proxied to a different Active Directory site, the virtual directory settings will be loaded from the Client Access server in the same site as the Mailbox server, not from the Client Access server where the connection originated.

The following tables indicate which virtual directory settings can be managed on which servers. If you try to manage a particular setting on a server for which it isn’t applicable, you will receive an error message indicating that the property you are trying to set is read-only for the server that you are operating on.

Exchange ActiveSync virtual directory settings on Client Access servers

 

Setting Server

BadItemReportingEnabled

Client Access

BasicAuthEnabled

Client Access

ClientCertAuth

Client Access

CompressionEnabled

Client Access

ExternalAuthenticationMethods

Client Access

ExternalURL

Client Access

InternalAuthenticationMethods

Client Access

InternalURL

Client Access

MobileClientCertificateAuthorityURL

Client Access

MobileClientCertificateProvisioningEnabled

Client Access

MobileClientCertTemplateName

Client Access

RemoteDocumentsActionForUnknownServers

Client Access

RemoteDocumentsAllowedServers

Client Access

RemoteDocumentsBlockedServers

Client Access

RemoteDocumentsInternalDomainSuffixList

Client Access

SendWatsonReport

Client Access

Exchange ActiveSync virtual directory settings on Client Access and Mailbox servers

 

Setting Server

ApplicationRoot

Client Access and Mailbox

AppPoolID

Client Access and Mailbox

MetabasePath

Client Access and Mailbox

Name

Client Access and Mailbox

Path

Client Access and Mailbox

ProxySubVdir

Client Access and Mailbox

VirtualDirectoryName

Client Access and Mailbox

WebsiteName

Client Access and Mailbox

In Exchange 2013, the implementation of the POP3 and IMAP4 protocols has also been segmented between the Client Access and Mailbox server roles. Due to the new implementation, POP3 and IMAP4 connectivity are each managed by a service on the Client Access server, as well as by a service on the Mailbox server. The names of the services that run on the Client Access server are the same as the names that existed in Exchange 2010: Microsoft Exchange IMAP4 service and Microsoft Exchange POP3 service. The names of the two new services that run on the Mailbox server are the Microsoft Exchange IMAP4 Backend service and the Microsoft Exchange POP3 Backend service.

Consider the following as you manage POP3 and IMAP4 connectivity in your organization:

  • If you are running the Client Access server role and the Mailbox server role on the same computer, any changes you make to POP3 or IMAP4 settings are automatically applied to the correct POP3 and IMAP4 services.

  • If you are running the Client Access server role and the Mailbox server role on separate computers, you need to manage the settings on the computer that manages the setting you want to change.

Use the following tables indicate which POP/IMAP settings are each server role.

POP3 and IMAP4 settings on Client Access server

 

Setting Server

AuthenticatedConnectionTimeout

Client Access

Banner

Client Access

ExternalConnectionSettings

Client Access

InternalConnectionSettings

Client Access

MaxCommandSize

Client Access

MaxConnectionFromSingleIP

Client Access

MaxConnections

Client Access

MaxConnectionsPerUser

Client Access

PreAuthenticatedConnectionTimeout

Client Access

UnencryptedOrTLSBindings

Client Access

POP3 and IMAP4 settings on Mailbox server

 

Setting Server

CalendarItemRetrivalOption

Mailbox

EnableExactRFC822Size

Mailbox

MessageRetrievalSortOrder

Mailbox

OWAServerURL

Mailbox

ProxyTargetPort

Mailbox

ShowHiddenFoldersEnabled

Mailbox

SuppressReadReceipt

Mailbox

POP3 and IMAP4 settings on Client Access and Mailbox servers

 

Setting Server

X509CertificateName

Client Access and Mailbox

EnforceCertificateErrors

Client Access and Mailbox

LogFileLocation

Client Access and Mailbox

LogFileRolloverSettings

Client Access and Mailbox

LoginType

Client Access and Mailbox

LogPerFileSizeQuota

Client Access and Mailbox

ProotocolLogEnabled

Client Access and Mailbox

Server

Client Access and Mailbox

X509CertificateName

Client Access and Mailbox

 
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