How to Convert OLM to MSG Files? Quick Ways

  • Written By  

  • Published on: July 10th, 2025

  • Updated on: August 19, 2025

User Query:

“I moved from a Mac to a Windows laptop, but I’m stuck—I am not able to open my old Outlook emails. Is there any way to convert them to MSG so they’ll work in Outlook on Windows?”

Summary: If you’ve been using Outlook on a Mac, your emails are stored in OLM format. The issue is that OLM files aren’t supported by Outlook on Windows. To access those emails, you’ll need to convert OLM to MSG Files, a format that works perfectly on the Windows version of Outlook. In this blog, we’ll see how to do that in effective ways, which can be manual or using an expert SysInfo OLM Converter Tool that’s secure, quick, and safe.

Various Techniques to Export OLM to MSG Format

Exporting OLM files to MSG format can be done using different methods, depending on your technical expertise and available tools. Below are the most commonly used techniques, each with its steps.

No Cost Technique to Transfer OLM File to MSG

To convert OLM files to MSG format manually, you can use a workaround involving an IMAP account and Outlook on both Mac and Windows. Follow these simplified steps to carry out the process without using any paid tool:

  1. Firstly, start Outlook for Mac and configure your email account.
  2. After that, go to File > Export, choose Mail, and export it as a .olm file.
  3. Later, add an IMAP-enabled account (like Gmail or Outlook.com) in Mac Outlook.
  4. Further, once synced, drag and drop OLM emails into the IMAP account.
  5. Next, wait until all emails are synced to the server completely.
  6. Now, start Outlook on a Windows PC.
  7. After that, add the same IMAP account to access the synced emails.
  8. Lastly, open any email, go to File > Save As, and choose MSG format.

Note: Repeat the same process for each email or use tools for batch saving.

Challenges Faced When You Convert OLM to MSG Manually

  • The process takes a lot of time, especially if you’re dealing with many emails or large files.
  • You might lose things like email formatting, folder structure, or the latest updates during the transfer.
  • Since it’s done manually, there’s always a chance of making mistakes that could affect the final results.
  • You’ll need to repeat the steps more than once, and Outlook must be installed on both Mac and Windows.

Common Error Occurs While Convert Mac OLM Files to MSG

Exporting OLM files to MSG format can be tricky if the process isn’t handled correctly. Below are some common errors users face during conversion, along with their causes and solutions:

  • MSG files would not open in Outlook
  • This happens when the file was created in one version of Outlook and opened in another one.

    Solution: Use the same Outlook version for both transferring and opening the files.

  • Sometimes Attachments get lost in between
  • In some cases, the converted emails are missing attachments, or they don’t open properly.

    What to do: Use a tool that’s known to handle attachments correctly, like the OLM to MSG Converter discussed below.

  • The layout of folders could be lost in the process.
  • After conversion, you might notice all your emails are converted into a single folder.

    Fix: Go for the automated tool that actually keeps your folder structure the same.

  • Conversion stops with big files
  • If your OLM file is large, the process can slow down or crash.

    Workaround: Split the file into smaller parts and convert them one at a time.

Professional Technique to Convert OLM to MSG

OLM Converter Tool is one of the recommended ways to manage and convert OLM mailboxes. The tool is good for multiple conversions and helps keep your data structure and formatting safe. It lets you export OLM files into MSG format on Mac, Windows, or Linux without any difficulty.

Some of its main features:

  • This tool helps to import OLM to Gmail and other email clients such as Office 365, AOL, and others.
  • This tool save emails from OLM to MSG and also supports file formats like EML, PDF, CSV, and more.
  • Let you do selective migration, remove duplicate emails, maintain folder structure, and apply useful filters

Now, follow the steps to complete the process:

  1. Firstly, install and start the OLM Transfer Tool on your Windows system.
  2. After that, select one option from the dual selection mode to add your OLM files.
  3. Later, select Next to view the mailbox folders in a tree structure.
  4. Further, select the folders you want to convert and select Next again.
  5. Then, choose MSG as the desired saving format from the list of options.
  6. Later, set the destination path to save the converted MSG files and apply any filters if needed.
  7. Lastly, select the Convert button to begin the process. Then, select OK to finish.

Conclusion

In conclusion, if you convert OLM to MSG manually, it will be difficult and require technical knowledge. Also, there are limitations, and things don’t always go as expected or required. If you do want any difficulty, using a proper tool like the OLM Exporter Tool makes it easier. You can convert multiple files at once without any errors or wasting time.

Frequently Asked Questions

Q1. Is it possible to batch convert OLM files to MSG format?

Ans. Yes, it is possible to batch convert OLM files to MSG format, but not using manual methods. You’ll need an expert OLM Conversion tool that supports multiple conversions. This tool lets you add multiple OLM files at once and convert them to MSG without losing folder structure and formatting. Also, you can try the demo version of it to learn more.

Q2. Can I inspect OLM email content before converting it?

Ans. Yes, the OLM Converter Tool comes with a built-in preview feature that helps to view the email content before transferring. You can review individual emails, attachments, and even folder structure to understand that everything looks right before starting the conversion. It reduces the chance of making a mistake.

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About The Author:

As a content writer, I specialize in Email Migration, Data Recovery, Email Backup, and File Management. I have been writing professionally for two years now. There is so much information available in this field that I am intrigued by the newer technologies and techniques.

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