Exchange 2010 fails to export large mailboxes to PST.

[Adventech]

PROBLEM:
Exchange 2010 fails to export large mailboxes to PST.
How to export mail boxes to PST in Microsoft Exchange 2010?
How to use MailboxExportRequest in Exchange 2010?

SOLUTION:
The simplest way to export mail boxes to PST is to us power shell. Before you begin you will need to create a network share on either the exchange server or another location and give read/write permission for "Exchange Trust Subsystems" group.



After that you are ready to export. The following commands will help you with exporting and monitoring the export.

Export Mailbox

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New-MailboxExportRequest -Mailbox john.doe -FilePath \\EXCHANGESERVER\pst\john.doe.pst

View the status of the request

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Get-MailboxExportRequest

View the status with more details

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Get-MailboxExportRequest -Name MailboxExport | fl

View the status of all requests

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Get-MailboxExportRequest | Get-MailboxExportRequestStatistics

Export Archive Mailbox

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New-MailboxExportRequest -Mailbox john.doe -FilePath \\EXCHANGESERVER\pst\john.doe.pst -IsArchive

Complete and Remove all requests

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Get-MailboxExportRequest | where {$_.status -eq "Completed"} | Remove-MailboxExportRequest

TROUBLE SHOOTING

Error: The term "New-MailboxExportRequest" is not recognized.

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New-ManagementRoleAssignment –Role "Mailbox Import Export" –User "DOMAIN\USER"
(replace "DOMAIN" with your domain and "USER" with Domain Admin User)

Restart PowerShell after adding the role!

Large Mailboxes Failing? add  -MRSServer exchange-server-name.domain.local or the CAS server name (see below).

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New-MailboxExportRequest -Mailbox john.doe -FilePath \\EXCHANGESERVER\pst\john.doe.pst -MRSServer exchange-server-name.domain.local