Opening an OLM file on Windows is not possible directly because Microsoft Outlook for Windows does not recognize OLM files. These files are specific to Outlook for Mac. To access OLM data on Windows, you need to convert the OLM file into a compatible format like PST, EML, or PDF. A professional solution such as MailConverterTools OLM Converter allows users to convert and then open OLM files on Windows without data loss. After conversion, the file can be opened easily in Outlook or other email clients on Windows.
Read more: https://www.mailconvertertools.com/blog/open-olm-file-on-mac-and-windows/