Use Powershell to export an Exchange 2013 Mailbox to a .pst file. The operator must have Full Control access on the target mailbox. The Exchange Trusted Subsystem must have Full Control NTFS and Share permissions on the target share.
#Initiate the mailbox export
New-MailboxExportRequest -Mailbox 'Mailbox1' -FilePath "\\server\share\folder\Mailbox1.pst" -Name 'Mailbox1-Export'
#Check the status of the mailbox export job
Get-MailboxExportRequest | ? {$_.Name -eq 'Mailbox1-Export'} | Get-MailboxExportRequestStatistics Name StatusDetail SourceAlias PercentComplete ---- ------------ ----------- --------------- Mailbox1-Export CopyingMessages Mailbox1 81