I have a better solution for you. Use this third-party tool OST to PST conversion tool that can convert your OST emails in few seconds instantly without data loss. The OST Converter tool carefully transfers ost emails, email properties, and attachments into Outlook PST, Zimbra, Gmail, EML, EMLX, vCard, ICS, MSG, Office 365, Live Exchange server, MBOX and etc. To import the entire OST to PST format and also work to split PST files into small parts by using free unlimited ost to pst converter from KDETools.
More info- Microsoft ost to pst converter
Through the help of ATS OST to PST Converter Software, user can convert single and multiple files along with emails, inbox, item submission, draft, item deletion, attachment, calendar, notes, task (To, Cc, Bcc , Date, From, Object and time). It is compatible with Windows operating system version 95, NT, 98, ME, XP, Vista, 7, 8 and 8.1,10 (32-bit and 64-bit).
It offers various save formats like PST, EML, EMLX, vCard, HTML, vCal, MSG and MBOX to restore the data after the conversion process according to your needs. You can migrate the selected data that you want to transfer. There is no need to install MS Outlook on your system to convert data from OST file to Outlook PST file.
Read More Info: https://ats-ost-to-pst-converter-toolkit.en.softonic.com/
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:
Go to Files >Open & Export and click Import & Export.
Select Export to a file; then click Next.
Select the second option—Outlook Data File (.pst)—and click Next.
Select the folder which you want to export and click Next.
Browse the location where you want to save the new PST file and choose the options regarding the duplicate items.
Hope this information is helpful to you
Migration from Emails, sent-items, inbox, drafts, contacts, calendars, deleted-items, outbox, notes (to, cc, subject, date, bcc and time) from OST to PST now very easy by taking the assistance of SysOZ OST to PST Converter software. You can convert your data into formats like EML, MSG, vCal, vCard, EMLX, MBOX etc. You can split the large sized PST files into small bits as per your needs, you can also see the preview of the conversion very easily.