The SysInspire Free Infinite OST to PST Converter program is an excellent and speedy migration tool for converting an unlimited number of mailboxes from Outlook OST files to Microsoft Outlook. The software allows you to convert OST files to PST files and convert emails, address books, and calendars. This application comes with a free demo edition that allows you to check out the procedure and see a preview of the complete email before making a purchase.
Read More:- Convert OST File to PST
Convert OST to PST Manually
Open Outlook and go to the File menu.
Select the Import/Export option.
Choose Export to a file.
Select Outlook Data File (.pst)