Wow Amazing third-party solution of KDETools OST file converter tool. It is the export emails, mails and etc. items from damaged ost file to pst file. This is the best way to convert OST files to Outlook pst file by using batch conversion option like that- file/folder. You can easily use its tool which you can transfer OST file emails item such as calendar, address book, draft, notes, meeting, task, Outbox and etc. into Outlook PST file.
Method 1: Export mailbox as a PST file
Login to Outlook with the Exchange account that was used to create the OST files. And to export the OST mailboxes to PST, follow the simple procedure as given here:
Go to Files >Open & Export and click Import & Export.
Select Export to a file; then click Next.
Select the second optionOutlook Data File (.pst)and click Next.
Select the folder(s) which you want to export and click Next.
Browse the location where you want to save the new PST file 5. and choose an option regarding the duplicate items.