Process to Import PST Files
STEP 1
Open your Outlook and go to the ribbon, Choose File.
Choose the Open & Export option> then, Import/Export. This will start the wizard.
Select "import from another file or program" & click on Next.
Select Outlook File (.pst) & click on Next.
Browse to your .pst file you want to import. Click on Next.
Click on finish. Outlook will start importing the data of .pst file. The progress box will go away when the process is finished.
User can Import PST files to Exchange Server by using a cmdlet in their MS Exchange management shell. Follow the given example if you want to import a single PST file to Exchange:
Cmdlet: New-MailboxImportRequest –Mailbox Johan –FilePath \ mymachine \ PST-Files \ Johan.pst