Here is a simple way to convert the OLM file into a PST file format.
vMail OLM to PST Converter tool supports the 30+email clients like Thunderbird, Gmail, Yahoo Mail, etc. This software also
moves the resultant file into other formats such as HTML, PST, MSG, EML,
etc. So, you can use this software on every version of Windows.
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Know more info- https://www.vsoftware.org/olm-to-pst-converter.html
