I would like to mention here ost to pst converter free from KDETools software that effortlessly transfer OST to Outlook PST, Zimbra, Gmail, EML, EMLX, vCard, ICS, MSG, Office 365, Live Exchange server, MBOX and etc. Along with its quickly works to transfer original Emails properties such as- TO, Bcc, Cc, subject, date, and etc. to import OST to PST Outlook format easily.
I recommend OST to PST Converter tool (DataRepairTools). User can use this converter for converting OST files, as well as save recovered items in several formats like EML, MSG, PST, PDF and HTML. The trial version is limited to recover 20 email items from each folder. If you want to recover all emails so quickly purchase the full version. It profoundly scans OST orphan issue and preserves your mailbox into a new PST file with 100% accuracy. The tool supports all versions of MS Outlook and Windows OS.
There are multiple third party tools available on the internet, you just need to find the right solution. I have used Softaken OST to PST Converter tool. when I required the same issue and got the accurate result. The software works on all Windows versions. A free demo version of this tool is also available few emails can easily be converted into each format.
If you need to search for the best method to convert or recover the OST data to PST and others. I would recommend using, the third-party tool Shoviv OST to PST converter. It provides the best error-free conversion and converts the various OST data files to PST, Office 365, Live Exchange Server with any intervention, and saves OST data to EML, MSG, and HTML formats. It recovers the permanently removed OST items and restores the unavailable data. it supports all versions of Outlook and Windows OS. It provides the free trial version which provides the ability to convert the first 50 items per folder.
More details, visit:- Convert OST to PST
I would recommend the Stellar Converter for OST. The aim of this tool is the converting of inaccessible OST to Outlook importable PST files. The tool allows you to save the converted e-mails in different formats such as PDF, HTML and other. The free test version can only convert 20 e-mails for OST to PST files. The tool also supports the MS Office 2000-2019.
Stella OST recovery software provides you safe conversion and recovery of Outlook OST emails and then allows to convert OST to PST file with some other format such as:- EML, MSG, HTML, MBOX, TXT as well as it also work on office 365 and live exchange server. This OST email conversion software deeply scans damage OST file data and save OST to PST outlook file format
I want to tell you about the Email Detail OST2PST. This tool is a must-have if you want to convert OST to PST easily and fast. The great part is that the user interface is interactive. Its totally free to use. You can learn more here - https://emailindetail.com/blog/new-ost-to-pst-converter-free-to-all-users