Special Mailboxes in Exchange 2013

Just like in Exchange 2010, there are hidden and special mailboxes in Exchange 2013.

Special Mailboxes in Exchange 2013
get-mailbox -arbitration

The Arbitration parameter specifies that the mailbox for which you are executing the command is an arbitration mailbox. Arbitration mailboxes are.

get-mailbox -monitor [New with Exchange 2013]

The Monitoring parameter specifies a list of mailboxes that have a value of MonitoringMailbox for the RecipientTypeDetails property. Two monitoring mailboxes are automatically created for each mailbox database in your organization: one for monitoring the health of public folders and one for monitoring the health of site mailboxes.

get-mailbox -archive

The Archive parameter specifies whether to return information about the recipient's archive mailbox.

get-mailbox -remotearchive

The RemoteArchive parameter specifies whether to disconnect the remote archive for this mailbox. A remote archive exists in a cloud-based service.

get-mailbox -publicfolder [New with Exchange 2013]

The PublicFolder parameter specifies that the mailbox is a public folder mailbox. Public folder mailboxes are specially designed mailboxes to store the hierarchy and content of public folders. This parameter is required to display information about a public folder mailbox.

What are these mailboxes?

Arbitration mailboxes:

The arbitration mailbox is used to store the original message that’s awaiting approval. By default, one arbitration mailbox is created for moderated transport during setup. It’s used for all moderated recipients. You can add additional arbitration mailboxes for load balancing purposes. If you’re using multiple arbitration mailboxes, you need to specify which mailbox to use for each moderated recipient.
~ http://technet.microsoft.com/en-us/library/dd297936.aspx ~

Monitor mailboxes:

The Monitoring parameter specifies a list of mailboxes that have a value of MonitoringMailbox for the RecipientTypeDetails property. Two monitoring mailboxes are automatically created for each mailbox database in your organization: one for monitoring the health of public folders and one for monitoring the health of site mailboxes.

Archive Mailboxes:

The Archive parameter specifies whether to return information about the recipient’s archive mailbox.

RemoteArchive:

The RemoteArchive parameter specifies whether to disconnect the remote archive for this mailbox. A remote archive exists in a cloud-based service.

Other new switches for Get-Mailbox in Exchange Server 2013.
-AccountPartition

This parameter is reserved for internal Microsoft use.

-IncludeLitigationHoldDuration

The IncludeLitigationHoldDuration parameter specifies the litigation hold duration (in days) that’s set for mailboxes on litigation hold. The litigation hold duration specifies how long each item is retained relative to its received date. You have to include this parameter to display this information.

-IncludeSoftDeletedMailbox

This parameter is reserved for internal Microsoft use.

-SoftDeletedMailbox
-UsnForReconciliationSearch

Removed Switches

-ForReconciliation

[This parameter is reserved for internal Microsoft use.]

This parameter applies to objects in the cloud-based service. It isn’t available for on-premises deployments.

TechNet Articles
http://technet.microsoft.com/en-us/library/bb123685.aspx