I suggest the best method to quickly migrate OLM to PST file so you can try automated software OLM to PST Converter.
It is very easy to transfer data single and multiple files without any data loss.
The Message Filtering option helps the users to select OLM items between two dates and start the conversion process.
This tool also supports all popular MS Outlook version 2019, 2016, 2013, 2010, 2007, 2003 and etc.
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http://www.olm-converter.com/[/td][/tr][/table]
