To convert OLM files to PST format, you can either use a manual or automated method. The manual method involves syncing your Mac Outlook data to an IMAP-enabled email account (like Gmail), then configuring the same account in Windows Outlook to export the data as PST. However, this process is complex and may lead to data loss.
A more efficient and secure solution is using the Aryson OLM to PST Converter tool, which allows you to directly convert OLM files to PST with all emails, contacts, calendars, and attachments preserved. It's user-friendly, supports batch conversion, and works with all major Outlook versions.