The best and most reliable way to convert an OLM file into PST format is by using a dedicated OLM to PST Converter software, especially one that ensures data integrity, supports all mailbox items, and works across both Mac and Windows platforms.
One of the most trusted solutions available today is the SysTools OLM to PST Converter. It simplifies the entire conversion process while preserving the original folder structure, formatting, and metadata of your emails, contacts, calendars, and more.