If you gonna use
ATS OST to PST Converter then you can alsoconverts OST file items, including emails, sent items, messages with attachments, contacts, etc.Recovers accidentally deleted mailboxes.Saves
converted file data in Outlook PST, EML, MSG, HTML,MSG,MBOX,vCal,vCard file
formats.Supports selective conversion of mail items from OST file based on
‘Subject’, ‘from’, ‘to’, ‘cc’, ‘bcc’, and ‘date’ based filters.Supports
automatic splitting of resultant PST file based on file size.
Read More: https://ats-ost-to-pst-converter-toolkit.en.softonic.com/