This software provides for a user can use quickly to import OLM to PST file so you try this method OLM Converter. The tool quickly convert Email items, attachment, contact, calendar etc. convert OLM files formats like PST, MBOX, HTML, PDF, MSG, EMLX. This OLM to PST tool is more compatible with window 10 and office 365.
To export OLM to PST there are two ways, one is a manual process, and another one is the use of an automated solution. The manual process is a tiresome and lengthy process to perform and you need to follow so many steps to convert OLM file in PST format. Here, I recommend you use Softaken for OLM to PST and export your mailbox data in Outlook from OLM supported email client in a single click. There is no need for any external source or software to use this versatile solution. It is compatible with Windows OS and supported by the Outlook email client. A user can migrate their multiple OLM files in PST format in a single click because it supports bulk OLM to PST Conversion. Get more details about the tool from here:- https://www.softakensoftware.com/olm-to-pst-converter.html