I'm reorganizing an old Outlook for Mac mailbox before switching to another email platform. The problem is that I don't need everything—there are only a few folders containing active projects that I want to migrate. Exporting the entire mailbox feels unnecessary, especially since it includes years of archived emails.

While searching for a solution, I found MacSonik OLM Converter . My goal was to use an automated desktop converter that gives more control over the migration process instead of forcing a full mailbox export. From what I've read, this tool allows selective folder conversion, so you can choose only the folders you want to convert instead of processing the complete OLM file.

Another feature that seems useful is the date-based filtering option, which could help if I only need emails from a specific period. That would make it much easier to archive older messages while migrating only recent business communications. I also like that the software reportedly preserves the original folder hierarchy, so the mailbox structure remains organized after conversion.

Since I may eventually move to another email client, it's good that the converter supports multiple output formats like PST, MBOX, EML, PDF, MSG, CSV, HTML, and EMLX, along with direct migration to services such as Gmail, Outlook, Office 365, Yahoo Mail, AOL, and Thunderbird.

Has anyone here used the selective conversion feature? Did it accurately migrate only the chosen folders while keeping emails, contacts, calendars, and other mailbox data intact? I'd appreciate hearing about real experiences before I start converting my archive.