Exchange: Importing Mail From PST Files (including Bulk Importing)
KB ID 0000443 Problem If you have mail in .PST file format that you would like to import, either exported via ExMerge from an older Exchange server, or Exported via Outlook, or even exported via PowerShell, then the process for importing that mail into Exchange has been the same since Exchange 2010 (SP1). Before SP1 you would have to install a copy of Outlook on the Exchange server and use a PowerShell command that looks like this...