Download and Install vMail OLM to PST Converter tool, in order to convert OLM files to PST file format with ease. After the installation launch the tool and follow these two simple steps.
Key Feature of this software;
Batch Conversion Maintains folder structure Retains Meta data Support multiple languages For Windows Users User Friendly Interface

Know more info- https://www.vsoftware.org/olm-to-pst-converter.html