Admins Handbook

First, give the right to do it, access to the new cmd’s:
New-ManagementRoleAssignment –Role “Mailbox Import Export” –User Administrator

Restart the EMC

Next, you need a share where “Exchange Trusted Subsystem” have write access.

Do the export:
New-MailboxExportRequest -Mailbox kim.nielsen -FilePath \\nas1\pst\kim.nielsen.pst

View the progress:
Get-MailboxExportRequest
Get-MailboxExportRequest | Get-MailboxExportRequestStatistics

Import:
New-MailboxImportRequest -FilePath \\nas1\pst\kim.nielsen.pst -Mailbox kim.nielsen -TargetRootFolder “Mailbox – Kim”
TargetRootfolder creates a root folder inside the mailbox