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Free Manual Methods to Convert OLM to PST Files

convert olm to pst file
Nilesh ~ Modified: January 29th, 2024 ~ Conversion ~ 8 Minutes Reading
Summary: This write-up will guide you through the steps to convert OLM to PST files for free. This method uses the Outlook email client. We have you covered with another solution, in case you want an Outlook-free conversion solution.

Microsoft Outlook is a major email client available for Windows and Mac Operating systems. So, whether it’s a Mac user or a Windows user, Outlook is a great option for email communication. However, in certain situations, many users switch from Mac to Windows and end up using Microsoft Outlook here as well. Now, one would think that since both the applications are the same on different OS, the data can easily be transferred between them. But, it turns out to be a difficult task.

Learn about it below.

Why do Users Want to Convert OLM to PST?

Microsoft Outlook for Mac uses OLM format to store data while Outlook for Windows uses PST format for the same. These mailbox files store emails, contacts, calendars, tasks, notes, and journals in their respective email clients. But, there is no option to directly import OLM files into Outlook for Windows. Hence, the only way one can access the OLM data in Windows Outlook is by converting OLM files to PST files.

As for the reasons why one would want to do that, they are listed below:

  • User is moving from Mac to Windows –

An Outlook user is moving from the Mac OS to the Windows OS, but wants to keep using the Microsoft services. In such a case, the user will want to access his/her local Mac data in the Windows Outlook client which calls for the OLM to PST conversion.

  • Access data from orphan OLM file –

The user has an orphan OLM file saved on the computer and wants to access its data on the Microsoft Outlook email client.

  • Someone shared an OLM file with the user, and he/she wants to view its data –

If someone shared an OLM file containing information useful to the user, then he/she will want to open and view OLM files in Outlook. This inadvertently leads to converting the OLM data files to PST format.

Manual Method to Convert OLM Files into PST Files

It is a free OLM to PST conversion method. It is recommended to have a backup of the original Outlook for Mac OLM file before proceeding with the manual conversion. This is done to avoid any potential risks that may arise during the execution of the free method. The manual method to convert OLM files into PST files is performed in four stages.

To save the data in PST file, you can use Outlook’s export option.

Step 1 – Configure an IMAP account in Outlook for Mac

First of all, to reduce complications, we recommend using a new Gmail account. Since it is a new account, you will need to enable some settings in it:

  1. Create a new Gmail account.
  2. Open it, click on the Gear icon and select See all settings
  3. Go to the Forwarding & POP/IMAP tab and scroll down.
  4. Checkmark the Enable IMAP box and Save the changes.

Now, it is time to configure the IMAP account in Outlook for Mac.

1. Choose Outlook | Preferences | Accounts.

2. Go hit the plus sign (+) and select New Account.

3. Provide the new account email address and click Continue.

4. Then, enter the password and click Add Account.

5. After that, click Continue.

click continue

6. Then, click Sign in to Google.

Sign in to Google

7. Provide your credentials again and click Allow button for confirmation.

Provide your credentials

click Allow button for confirmation

8. Click Open Microsoft Outlook.

click Allow button for confirmation

9. Finally, click the Done button.

click the Done button

Step 2 – Move OLM data into the IMAP account

In this step, copy all the emails from the OLM profile in Outlook for Mac that you want to export from OLM to PST. And paste the emails in the configured IMAP account.

Open the same account in your browser to confirm that all the emails are successfully synchronized and are available in the Gmail account for the next step.

Step 3 – Configure same account in Outlook for Windows

Now that you have the data successfully placed in the Gmail account, it is time to move it to Outlook for Windows.

1. Run Outlook on Windows system and click File | Add Account.

click File | Add Account

2. Enter the IMAP account details and click the Connect button.

click the Connect button

3. Confirm the password and click on Sign in.

Confirm the password

4. Click Allow to allow permissions required for configuration.

allow permissions

5. Finally, click on Done button.

click on Done

With this, the OLM emails are moved to Windows Outlook, it is time for the last OLM to PST conversion step.

Step 4 – Export data in PST file

Now, you will notice that all the emails saved in OLM file is now present in your IMAP account on Outlook for Windows. You will need to let the emails synchronize to view all the email messages. Once you can verify that everything is present, simply export them to PST, if that’s what you want.

1. Go to File, then Open & Export | Import/Export.

go to import/export

2. After that, select Export to a file.

select Export to a file

3. Then, select Outlook data file (.pst).

select Outlook data file (.pst)

4. Now, choose the new IMAP account for export.

choose the new IMAP account

5. Browse the location to save the PST file and click Finish.

Browse the location to save the PST file

6. If you want to encrypt the file behind a password, then type in the password. If not, simply click the OK button.

Challenges in Manual OLM to PST Conversion

The free OLM to PST conversion method is helpful in some situations, but it has many limitations. Some of them are:

  • Complicated and tedious method for a non-tech user
  • Time-consuming that may take days to complete
  • A manual error puts the entire procedure at risk
  • Loss of data or incomplete data transfer is a likely scenario
  • Only applicable for moving OLM emails
  • Requires additional steps for migrating each mailbox item, i.e., contacts, calendars, etc

Using a Professional Solution for OLM to PST Conversion

OLM Converter is a powerful OLM to PST conversion tool. This professional tool saves OLM files from Outlook for Mac 2011, 2016, 2019 in Outlook PST directly. It has many advantages over the free OLM to PST converter method.

It has the facility of saving OLM file into several PST files. This program can also transfer specific data using the advanced filter settings as per user choice. There is no need for Microsoft Outlook to be installed on the computer to perform the task. And the best thing is you have two variants to get the job done:

Windows variant – Simply use the software on the Windows system and convert the ported over OLM file into PST format. The Windows-based application has a preview feature to showcase all the emails before conversion. It also encapsulates a category selection, date-range filters, and split file options.

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Mac variant – The Mac-based software allows you to migrate the data from OLM files into PST format on the Mac system itself. Afterward, whether you want to move the PST file to Windows system, share it with others, etc., it is your choice.

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Both the software are available as a free demo version that allows you to carry out limited OLM to PST conversion. It is perfect to test the tool and understand its working before deciding on its full version.

The tool allows converting Outlook for Mac contacts to Outlook for Windows, along with emails, calendars, tasks, and journals.

Learn about its interface, features, and work with the steps of the converter software.


1. Run the Windows-based application and click Add File to select OLM files.

add file

2. Browse the OLM file.

add olm file

3. After selecting the OLM file, the software previews the OLM file data.

preview olm data

4. Then, click Export

click export

5. After clicking the Export button, then choose the PST format.

select pst

6. After that, apply Advance Settings.

apply advance settings

7. Finally, click on the Export button.

start olm to pst conversion

8. The NSF to PST converter starts the process and displays a message after a successful conversion.


1. Run the Mac-based OLM converter and click Add File.

click add file

2. Select and add OLM file, then click Next.

select olm file

3. Select PST format.

select pst format

4. Apply Advance Settings.

apply advanced settings

5. Click Export to start converting OLM to PST file.

export olm files to pst

Watch Video for Complete Conversion Process



These are the video tutorials for both professional solutions.

Infographic on OLM to PST Conversion

Following is the infographic on the same topic:

infographic on olm to pst conversion

Summing Up Everything

This write-up discussed the top reasons to convert OLM files to PST files and brings out the practical methods for conversion. The free manual method includes configuring an IMAP account in both Outlook for Mac and Outlook for Windows clients and moving data between them. Here, the manual method has certain drawbacks, and to overcome them, a better way is explained that uses professional OLM to PST converter solution.


Q- Is it necessary to create a new Gmail account for executing the free manual method?

A- No, it is not necessary to create a new Gmail account. You can use an already existing account, as well as accounts of other webmail services like Outlook.com, Yahoo, etc. Just make sure to confirm that it allows IMAP configuration.

Q- Can I migrate contacts from Outlook for Mac OLM files to PST?

A- Yes, you can choose contacts from the Category option (along with emails, calendars, tasks, journals) and move them to PST format.