Recover Outlook OST file
Download the eSoftTools OST Recovery tool because it’s a very famous and useful tool that easily works in all Windows OS and MS Outlook versions such as 2019, 2010, 2007, 2003, 2013, and 2016. It also provides many types of file formats to convert Outlook OST files such as EML, EMLX, HTML, MSG, ICS, Zimbra, Yahoo, Gmail, Office 365, vCard, and MBOX. It also converts elective OST files by date range with an email filtering option. Download the free demo version of this tool from the official website of eSoftTools.
Read more- https://www.esofttools.com/ost-recovery/

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Peter909 commented
The FixVare OST Converter provides a reliable way to recover Outlook OST files with zero data loss. It can easily recover corrupted or inaccessible files and ensure 100% safety and security during the recovery process without compromising data integrity. It provides a selective data recovery feature in that the user can recover required data instead of the entire OST file, which saves the time and effort of all users. It provides a free demo version for all users so they can easily understand it without any problem.
Read More Info: https://www.fixvare.com/products/ost/ -
Jacksonallen commented
If you are looking for a solution to recover data from OST file then try Advik OST Repair Tool on your system. The software can easily recover data from damaged OST files in just a few simple clicks. The tool allows you to preview all of the recovered items from Outlook OST file including folders and other data. This option will help you to check the data which is recovered and maintained in its original format.
Read More: https://www.adviksoft.com/ost/recovery.html