How to Export Mailboxes with Exchange Server 2010 SP1（带状态查看，清除请求，归档备份）

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　　想要挪空间，就得邮箱数据库导入导出，转来转去。
　　备份邮件导入导出的。
　　以下帖子，超实用的。
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　　~~~~~~~~~~~~~
　　http://exchangeserverpro.com/export-mailboxes-exchange-server-2010-sp1/
　　Exchange Server 2010 Service Pack 1 introduced a new method for exporting mailboxes called Mailbox Export Requests.  This new method replaces the previous Export-Mailbox command.
　　Before we look at how to create a new mailbox export request in Exchange 2010 SP1 there are a few things that you should understand.
　　Firstly, no accounts are granted the rights to export mailboxes by default.  You need to explicitly grant these rights, even to accounts that are organization administrators.
　　Secondly, the mailbox export request is processed by the Client Access server role.  Because multiple Client Access servers can exist in a site the request could be processed by any one of them.  To ensure that the path to the export PST file is valid for any Client Access server it has to be a UNC path to network share, not a local path.

Granting User Rights for Mailbox Exports in Exchange 2010 SP1
　　The first step is to grant the right to export mailboxes to an account in your organization.  In the Exchange Management Shell run the following command.

New-ManagementRoleAssignment –Role "Mailbox Import Export" –User Administrator
　　If you’re logged with that user already simply restart your Exchange Management Shell session to be granted access to the new cmdlets.

Creating a Network Share for Mailbox Exports in Exchange 2010 SP1
　　Next we need to create the network share that will be used as the file path for the exported PST files.  All that is required here is a network share that the Exchange Trusted Subsystem group has read/write permission to.


Exporting a Mailbox with an Exchange Server SP1 Mailbox Export Request
　　With everything configured properly we can now use New-MailboxExportRequest to start the mailbox export.  The only two required parameters for the command are the file path to the export PST file, and the name of the mailbox to export.

[PS] C:\>New-MailboxExportRequest -Mailbox alan.reid -FilePath \\esp-ho-ex2010a\pst\alan.reid.pst
Name                                           Mailbox                                        Status
----                                           -------                                        ------
MailboxExport                                  exchangeserverpro.net/Company/Users/Head Of... Queued
　　To view the status of the request use the Get-MailboxExportRequest cmdlet.

[PS] C:\>Get-MailboxExportRequest
Name                                           Mailbox                                        Status
----                                           -------                                        ------
MailboxExport                                  exchangeserverpro.net/Company/Users/Head Of... InProgress
　　You can also see more detail about the mailbox export request with Get-MailboxExportRequest.

[PS] C:\>Get-MailboxExportRequest -Name MailboxExport | fl
RunspaceId     : c48a9069-e572-4c65-80ea-773e61e5337e
FilePath       : \\esp-ho-ex2010a\pst\alan.reid.pst
SourceDatabase : MB-HO-01
Mailbox        : exchangeserverpro.net/Company/Users/Head Office/Alan.Reid
Name           : MailboxExport
RequestGuid    : 9de3a722-0c82-4e34-98bf-0ff624c47c16
RequestQueue   : MB-HO-01
Flags          : IntraOrg, Push
BatchName      :
Status         : InProgress
Protect        : False
Suspend        : False
Direction      : Push
RequestStyle   : IntraOrg
OrganizationId :
Identity       : exchangeserverpro.net/Company/Users/Head Office/Alan.Reid\MailboxExport
IsValid        : True
　　An easy way to see the progress of all mailbox export requests is to pipe Get-MailboxExportRequest into the Get-MailboxExportRequestStatistics cmdlet.

[PS] C:\>Get-MailboxExportRequest | Get-MailboxExportRequestStatistics
Name                                   Status                    SourceAlias                           PercentComplete
----                                   ------                    -----------                           ---------------
MailboxExport                          InProgress                Alan.Reid                             20
Exporting an Archive Mailbox with Exchange Server SP1 Mailbox Export Request
　　You can also export a user’s Personal Archive using mailbox export requests simply by adding the -IsArchive parameter to the command.

[PS] C:\>New-MailboxExportRequest -Mailbox alan.reid -FilePath \\esp-ho-ex2010a\pst\alan.reid.pst -IsArchive
Completing the Mailbox Export Request
　　When a mailbox export request is completed it remains on the server until it is removed by an administrator using Remove-MailboxExportRequest.
　　To see all of the completed mailbox export requests run this command.

[PS] C:\>Get-MailboxExportRequest | where {$_.status -eq "Completed"}
Name                                           Mailbox                                        Status
----                                           -------                                        ------
MailboxExport                                  exchangeserverpro.net/Company/Users/Head Of... Completed
　　And to clear all completed mailbox export requests from Exchange run the following command.

[PS] C:\>Get-MailboxExportRequest | where {$_.status -eq "Completed"} | Remove-MailboxExportRequest