Using the Shoviv OLM to PST tool will allow you to convert the OLM email files to PST. It converts the OLM files into PST file format and keeps emails, attachments, folders, and metadata intact. Some of its features include batch conversion, advanced filtering, incremental conversion, migration of emails, and maintenance of folder hierarchy. It is also able to export OLM files to PST, EML, MSG, HTML, ICS, and vCard file formats.
If you need to convert OLM files to PST in 2026, a dedicated OLM-to-PST converter is generally the simplest option, especially when moving Outlook for Mac data to Windows Outlook. Before choosing one, check whether it preserves folders, attachments, and other mailbox data and lets you preview the source before export.
Softaken OLM to PST Converter is one option worth testing. It can convert OLM to PST, preview mailbox data before export, preserve folder hierarchy and metadata, and work without requiring Outlook to be installed. It also provides a free evaluation mode that exports the first 10 items from each folder, so you can verify the output before purchasing.
You can check the tool here: OLM to PST Converter - Operate OLM file to Create Outlook for Windows
If you need to convert an OLM file to PST, there are a few approaches you can try, but the best option depends on the size of the OLM file and whether you need to preserve the complete folder structure.
For a small OLM file, you can manually export or move emails through Outlook/Microsoft 365, but this can become complicated when dealing with a large mailbox or multiple folders.
For a more straightforward option, I’d suggest trying BLR OLM Converter. It can convert OLM files to PST while maintaining the mailbox folder hierarchy and can be useful when you need to migrate emails from Outlook for Mac to Outlook for Windows. It also supports bulk conversion, which is helpful if you have multiple OLM files.
I’d recommend using the trial/free demo first to preview the data and verify that the conversion meets your requirements before purchasing.
Switching from Outlook for Mac to Windows can be a little confusing because both versions use different mailbox formats. Mac Outlook stores data in OLM files, whereas Windows Outlook primarily uses PST. So, if you have a large OLM archive, simply moving the file to Windows will not make the data accessible.
For smaller mailboxes, some users try the IMAP/Gmail method to move emails between Outlook versions and then export the data to PST. However, this can be a lengthy process, especially when dealing with large archives, attachments, contacts, calendars, and multiple folders. There is also a possibility of folder hierarchy issues during the transfer.
For a large archive of 20 GB or more, I would consider using a dedicated converter such as the SysInfo OLM Converter Tool. It is designed to convert OLM files into PST and can help migrate mailbox items such as emails, attachments, contacts, and calendars while retaining the folder structure. The software also provides options to preview OLM data and remove duplicate items before conversion.
That said, I would not rely on any conversion tool blindly. Keep a complete backup of the original OLM files, test the converted PST, and verify important emails and folders before deleting the source data. For large migrations, this extra verification step can help minimize the risk of data loss.
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