You can use the TrunstVare OST to PST Converter Tool for converting emails, attachments, contacts, calendars, and notes from OST to PST files. The OST to PST migration tool supports all versions of MS Outlook, like 2021, 2019, 2016, 2013, etc. This app also operates on all Windows OS versions. This tool transfers bulk emails from OST to PST files with their attachments in a short time while maintaining data. Users can restore OST corrupted data and preview the OST files before transferring. It provides a free demo version to test the application for experience before purchasing, and customers can also convert a few emails from OST to PST files. 

Get more information here: https://www.trustvare.com/ost/pst/

The Mailvita OST to PST Converter for Mac Tool allows users to convert OST files to PST files. This approach moves all emails, attachments, contacts, calendars, and notes from OST to PST files without affecting the database. This software migrates unlimited and enormous volumes of emails from OST to PST format without causing any technical difficulties. A useful utility that works on all Mac and Windows operating systems. It provides the option of recovering the OST corrupted database. Showing the preview OST files before the transfer procedure. Users can try out the software by installing the free demo version. This tool works on all Mac and Windows operating systems.

Visit here: https://www.mailvita.com/ost-to-pst-converter-for-mac/

The BLR OST to PST Converter Tool is a reliable solution for converting OST files to PST format. It ensures seamless data migration, preserving all emails, attachments, contacts, and other mailbox items. The software is user-friendly and compatible with different versions of Outlook, making the conversion process simple even for non-technical users. With its advanced features, it efficiently handles corrupted or inaccessible OST files, providing a hassle-free way to restore and access important data.

Read More:- https://www.blrtools.com/ost-to-pst-converter.html

Users can download and use the MailConverterTools OST to PST Converter for a safe and secure conversion of OST files. This tool can effectively convert a single as well as multiple OST files simultaneously. It provides multiple saving options enabling users to save OST files into PST, PDF, EML, MBOX, CSV, Gmail, AOL, IMAP, etc. This tool preserves folder hierarchy and keeps data intact throughout the process. Also, it has a date filter option for selective migration of OST files. Moreover, this tool supports all the older and latest versions of MS Outlook.

To know more: https://www.mailconvertertools.com/ost-to-pst/

Another software that I would like to recommend is the CloudMigration OST to PST Converter. It is the most trusted and reliable software to convert offline OST files to Outlook PST files. With this tool, users can export OST files of a particular date range. Its user-friendly interface makes it easy to use and doesn't require any technical knowledge. You can convert OST to PST for any Outlook version as it doesn't use the Outlook application.

If you want to import an OST file into Office 365 cloud account then I would like to recommend you to use MacMister Mac OST Converter. It is an amazing and fast migration utility. With this program, you can quickly import an OST file into Office 365 account including emails, notes, tasks, calendars, tasks, and journals. It is capable to export multiple OST files to O365 account at once. Also, you can try the program working using the free trial edition which permits to migrate only 25 OST items per folder without cost.
Read More- https://www.macmister.com/ost/