Before you create any Export or Import; review/modify the max values for Transport, Receive and Send PS C:\Set-TransportConfig -MaxSendSize 100MB -MaxReceiveSize 100MB PS C:\Get-ReceiveConnector | Set-ReceiveConnector -MaxMessageSize 100MB PS C:\Get-SendConnector | Set-SendConnector -MaxMessageSize 100MB To create an export request: PS C:\New-MailboxExportRequest -Mailbox UserName -FilePath “\\server\folder\username.pst” ** You need to grant read/write permission to the group ..