SameTools to Convert OST to PST
SameTools to Convert OST to PST is safely convert multiple OST files to PST format without any hassle. It smoothly transfers emails, attachments, contacts, calendars, and other mailbox items while preserving original folder hierarchy and metadata. With a user-friendly interface and fast processing of conversion. Utilize the application on all Windows versions and compatible with all MS Outlook versions.
More Information https://www.sametools.com/convert/ost/