OLM file is an email database file for MS Outlook application for macOS. This file stores all type of emails, contacts, calendar, tasks, notes, journals, etc from your email account in Outlook for Mac. If you want to migrate all these email data from Mac Outlook to Outlook for Windows, then you need to convert olm file to pst format. There is no option in Outlook application to perform olm to pst conversion.
OLM file Converter from V Software is a third-party tool that restores all mailboxes and other data from the OLM file and export to PST file. This PST file is also an Outlook data file in Windows computer. Further, you can easily import the PST file in any latest and all older version of Microsoft Outlook and access your important inbox messages and other data from Mac Outlook olm file.
Note: Mac version of this software is also available now.