How to Migrate OLM to PST via IMAP Sync Method

When users migrate from Mac Outlook to Windows Outlook, one common problem they face is file compatibility. Microsoft Outlook for Mac stores mailbox data in OLM file format, while Outlook for Windows supports PST file format only. Due to this difference, users cannot directly open or migrate OLM files into Outlook for Windows.

To fix this problem, users look for different ways to migrate OLM files to PST. The IMAP Sync Method is a well-known manual solution. This method lets users sync their Mac Outlook emails with an email account that supports IMAP. Then, they can open the same emails in Outlook for Windows.

This blog post will show you how to move OLM to PST using the IMAP Sync method. We’ll do it in a step-by-step way that is easy to understand. We will also talk about its limits and some important things you should know before you use this method.

What are the OLM and PST file formats?

Let’s take a quick look at these two file types before we start the migration process.

File OLM

Microsoft Outlook for Mac uses the OLM data file. It keeps emails, contacts, calendars, notes, tasks, and other things in the mailbox. Outlook for Windows does not support OLM files. They only work on macOS.

File PST

Microsoft Outlook for Windows uses PST (Personal Storage Table). It keeps emails, attachments, contacts, calendars, and other mailbox information. It’s easy to add PST files to Outlook on Windows.

Users have to migrate OLM data to PST format because Outlook for Windows doesn’t support OLM files.

What is the IMAP Sync Method?

You can use the IMAP Sync Method to migrate emails from Mac Outlook to Windows Outlook by hand. You use an email account that supports IMAP, like Gmail, Yahoo, or Outlook.com, as a bridge in this method.

The main idea is:

• Set up an IMAP account in Outlook for Mac
• Sync the data in your OLM mailbox with the IMAP server.
• Set up the same IMAP account in Windows Outlook
• Get the emails that are synced
• Send the emails to a PST file

This method doesn’t need any third-party software, but it does take a lot of steps and work to do.

Requirements for the IMAP Sync Method

Make sure you have the following before you begin:

• Microsoft Outlook for Mac, set up with OLM data
• Microsoft Outlook for Windows
• A reliable internet connection
• An email account that supports IMAP and is currently active (Gmail is best)
• The IMAP account’s login information
• The IMAP mailbox has enough space to store things.

How to Migrate OLM to PST Using the IMAP Sync Method

Step 1: Set up or create an IMAP email account

First, you need an email account that works with IMAP. People use Gmail a lot.

• Make a new Gmail account (recommended to keep your data separate)
• Turn on IMAP in Gmail settings.
• Open Gmail Settings
• Click “See all settings.”
• Click on “Forwarding and POP/IMAP.”
• Allow IMAP access
• Keep changes

Step 2: Set up your IMAP account in Outlook for Mac

Next, set up the IMAP email account in Outlook for Mac.

• Start Outlook for Mac
• Select Accounts from the Tools menu.
• Add an Email Account by clicking
• Type in your IMAP email address and password.
• Set up the settings for the incoming and outgoing servers
• Finish the setup

Outlook for Mac will sync the IMAP mailbox once it is set up.

Step 3: Put OLM emails in the IMAP folder

You need to migrate your OLM mailbox data to the IMAP account after you add it.

• Find your OLM mailbox folders in Outlook for Mac.
• Choose the emails you want to migrate
• Drop the emails you want to migrate into the IMAP account folders.
• Outlook will begin sending emails to the IMAP server.

Depending on the size of your mailbox and the speed of your internet, this process could take a while.

Step 4: Wait for everything to sync up.

This step is very important.

• Check that the IMAP server has all of your emails.
• While syncing, don’t close Outlook.
• Check the number of emails to make sure all the data is there.

It could take hours or even days for large mailboxes to sync completely.

Step 5: Set up the same IMAP account in Outlook for Windows.

After the Mac has finished syncing, go to the Windows system.

• Start Outlook for Windows
• Click on File > Add an account
• Type in the same email address and password for IMAP.
• Finish setting up your account
• Outlook will begin downloading emails from the IMAP server.

Step 6: Check Emails in Windows Outlook

After syncing is finished:

• Look through all of your emails and folders.
• Check the dates, subject lines, and attachments.
• Make sure you have all of your emails.

This shows that the OLM to Outlook data transfer via IMAP worked.

Step 7: Save IMAP emails to a PST file

Now, save the synced emails as PST files.

• Start Outlook for Windows
• Select File > Open & Export
• Press Import/Export
• Choose “Export to a file.”
• Choose the Outlook Data File (.pst) option.
• Select IMAP folders to export
• Choose where you want to go
• Finish the process of exporting

When you export, you will get a PST file with your OLM emails in it.

Key Things to Know About the IMAP Sync Method

• Only the email is moved
• No contacts, calendars, notes, or tasks are supported.
• The way the folders are organized might not stay the same.
• Needs a steady internet connection
• It takes a long time for big mailboxes to sync.

What the IMAP Sync Method Can’t Do

IMAP Sync is a free way to do things by hand, but it has some problems:

• A process that takes a lot of time

It can take hours to upload and download emails.

• Risk of Losing Data

If the network goes down, the sync may not be complete.

• No Help for Things Other Than Email

No calendars, contacts, or notes are moved.

• Limit on the size of the mailbox.

IMAP providers limit how much storage you can use.

• Difficulties with Technology

Not good for people who aren’t tech-savvy.

Is the IMAP Sync Method Good for Everyone?

If you have a small mailbox, the IMAP Sync method is a good choice.

• You only need to migrate your emails.
• You don’t want to pay for tools
• You have enough time and patience.

But if you have a lot of emails or need to migrate all of your data, this method might not be the best.

Alternative Solution for OLM to PST Migration

Many users choose to use professional GainTools OLM to PST Converter instead of the IMAP Sync method because it has some problems. This tool smoothly migrates OLM files to Outlook PST.

These tools give you:

• OLM to PST migration right away
• Moving emails, contacts, calendars, and attachments
• A faster and safer process
• Not relying on the internet
• Easy-to-use interface

These kinds of tools save time and lower the chance of losing data.

How to Use a Tool to Migrate OLM to PST Step by Step

• Get the software and install it.

Download and install the trusted OLM to PST Converter software.

• Add an OLM file

Open the software and look for the OLM file to add it.

• Preview Data

Check the preview of your emails and folders.

• Choose PST Format

Choose PST as the export format and set the location.

• Begin Migration

Click the migrate button and let the process finish.

1. Import PST into Outlook

Import the PST file you made into Outlook.

In conclusion

If you want to migrate emails from Outlook for Mac to Outlook for Windows without using third-party software, the IMAP Sync method is a manual but effective way to do it. People can sync their OLM mailbox data and then export it to PST format by using an IMAP email account.

But this method has a lot of problems, like being slow, not working with contacts or calendars, and needing a strong internet connection. Using a professional migration tool is a better choice for big or business mailboxes.

We hope this step-by-step guide makes it easy for you to understand how to use the IMAP Sync method to migrate OLM to PST.

Frequently Asked Questions (FAQs)

Q1. Is it possible to migrate OLM to PST using the IMAP Sync method?

You can use the IMAP Sync method, but it only moves emails and takes longer.

Q2: Can you use the IMAP Sync method with calendars and contacts?

No, this way does not work with tasks, contacts, or calendars.

Q3. Do you need the internet to migrate OLM to PST?

Yes, IMAP Sync needs a reliable internet connection. The software method doesn’t need the internet.

Q4. Does IMAP Sync work with big OLM files?

This method is slow for big OLM files and could cause sync problems.

Q5. What is the best way to sync that isn’t IMAP?

The best and safest choice is to use a professional OLM to PST Converter program.

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