OLM to Exchange Migration: Import Mac Outlook to Exchange
Importing OLM files to Exchange Server, Exchange Online or Hosted Exchange lets you move Mac Outlook email archives into a Windows enterprise email environment. The Turgs OLM Converter connects to Exchange via EWS and transfers all OLM emails with folder structure and attachments intact. Free trial migrates 25 emails per folder.
OLM is Mac Outlook’s archive format. Exchange is a Windows platform. They do not speak the same language directly.
If you are migrating a Mac user’s email archive to an Exchange Server environment, or consolidating Mac and Windows Outlook users into a single Exchange organisation, this guide shows how to import OLM to Exchange step by step.
Why Import OLM to Exchange?
The most common reasons for this migration:
- A team member switching from Mac Outlook to Windows Outlook and an Exchange account
- Migrating a department from Mac-based email to a centralised Exchange server
- Archiving Mac Outlook email history into an Exchange Online mailbox for compliance
How to Import OLM to Exchange
Download and install the Turgs OLM Converter on your Windows PC. The free trial migrates 25 emails per folder.
Step-by-Step: OLM to Exchange Migration
Step 1. Launch the Turgs OLM Converter on Windows. You see the main interface.
Step 2. Click Add Files or Add Folder to load your OLM file. You can load multiple OLM files at once.
Step 3. The tool loads your OLM folders. Select the email folders you want to migrate to Exchange.
Step 4. From the saving options, select Exchange Server, Exchange Online or Hosted Exchange as your destination.
Step 5. Choose the language settings and admin options for your Exchange target.
Step 6. Enter your Exchange admin credentials. The tool connects to Exchange via EWS (Exchange Web Services).
Step 7. Click Migrate. The tool begins transferring OLM emails to Exchange with a live progress display.
Step 8. The migration summary shows how many emails were transferred per folder. Verify by opening Outlook or OWA with the target account.
Supported Exchange Versions
The Turgs OLM Converter supports all Exchange versions including Exchange 2007, 2010, 2013, 2016, 2019 and Exchange Online (Microsoft 365). All three Exchange hosting models (on-premises, cloud and Hosted Exchange) are supported.
If you also need to convert OLM contacts rather than emails, see the guide on converting OLM contacts to CSV. For PST-based Exchange imports, see the PST to Exchange migration guide.
Are you importing OLM from a single Mac Outlook user or migrating a whole team’s archives?
Frequently Asked Questions
Can I import OLM to Exchange Online (Microsoft 365)?
Yes. Select Exchange Online as the destination and enter your Microsoft 365 admin credentials. The tool imports directly to cloud mailboxes via EWS.
Does Outlook need to be installed on the migration PC?
No. The tool reads OLM files directly and connects to Exchange via EWS. No Outlook installation is required.
Can I migrate multiple OLM files in one run?
Yes. Load multiple OLM files using the Add Folder option and map each one to the corresponding Exchange mailbox.
Will folder structure be preserved in Exchange?
Yes. Each OLM folder maps to the corresponding Exchange mailbox folder with the same name.
What Mac Outlook versions does the OLM format support?
OLM files from Mac Outlook 2011, 2016, 2019 and 2021 all work with the Turgs OLM Converter.
How long does OLM to Exchange migration take?
A typical 5 GB OLM file migrates to Exchange in 1 to 2 hours depending on network speed and Exchange throttling.
