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Protocol (POX)

Last modified: March 16, 2009

Applies to: Exchange Server 2007 | Exchange Server 2010

The Protocol element contains the specifications for connecting a client to the computer that is running Microsoft Exchange Server 2007 that has the Client Access server role installed.

AutoDiscover (POX)
  Response (POX)
    Account (POX)
      Protocol (POX)


The following sections describe attributes, child elements, and parent elements.



Child Elements



Type (POX)

Identifies the type of the configured mail account.

Internal (POX)

Contains the collection of Outlook Web Access URLs that a client can connect to when it is inside the firewall.


Specifies the Time to Live, in hours, during which the settings remain valid.

Server (POX)

Specifies the name of the mail server.

ServerDN (POX)

Specifies the Exchange Server distinguished name.

ServerVersion (POX)

Represents the Exchange Server version number.


Represents the distinguished name of the mailbox database.

Port (POX)

Specifies the port that is used to connect to the store.

DirectoryPort (POX)

Specifies the port that is used to connect to the directory when the Name Service Provider Interface (NSPI) protocol is used.

ReferralPort (POX)

Specifies the port that is used to get a referral to a directory.


Specifies the URL of the best instance of the Exchange Web Services for a mail-enabled user.


Specifies the URL of the best instance of the Availability service for a mail-enabled user.


Specifies the Offline Address Book configuration server URL for an Exchange topology.


Specifies the URL of the best instance of the Unified Messaging Web service for a mail-enabled user.

LoginName (POX)

Specifies the user's logon name.

DomainRequired (POX)

Indicates whether the domain is required for authentication.

DomainName (POX)

Specifies the user's domain.


Indicates whether secure password authentication is required.

AuthPackage (POX)

Specifies the authentication scheme that is used when authenticating against the Exchange 2007 computer that has the Mailbox server role installed.

CertPrincipalName (POX)

Specifies the Secure Sockets Layer (SSL) certificate principal name that is required to connect to the Microsoft Exchange organization by using SSL.


Specifies whether secure logon is needed.

AuthRequired (POX)

Specifies whether authentication is required.

UsePOPAuth (POX)

Indicates whether the authentication information that is provided for a POP3 type of account is also used for Simple Mail Transfer Protocol (SMTP).


Specifies whether the SMTP server requires that e-mail be downloaded before it sends e-mail by using the SMTP server.

NetworkRequirements (POX)

Contains the criteria that are used to determine whether the client computer is on a network that meets the Internet Service Provider's requirements to connect to the server.

Parent Elements



Account (POX)

Specifies account settings for the user.

The Protocol element is present in a response that has an Action (POX) value that is equal to settings.