Easily convert OLM files to PST, MBOX, EML, MSG, PDF, CSV, VCF, DOCX, and ICS formats on Windows, Mac, and Linux. This software also migrates OLM files to Office 365, Gmail, G Suite, Thunderbird, Hotmail, IMAP servers, and other email clients. For any issues, you can refer to the Functional & Technical Documentation (FTD) Guide for complete assistance.
Step 1: Download and launch the Aryson OLM Converter Tool on your system.
Step 2: Add the required OLM Files
Use the available options to load Outlook for Mac OLM files into the software.
Add the desired OLM file(s), verify the details, and click Proceed to preview and convert the data.
Step 3: Preview & Search OLM Mailbox Data
The Advanced Preview Panel displays the following details:
The Date, To, From, and Subject fields of the email. Along with that, the following details are displayed as well.
Step 4: Now, mark the Export File Format radio button and select the required file formats as required. The supported output formats are PST, PDF, MBOX, CSV, EML, MSG, DOCX, PNG, ICS, VCF, PDF, CSV, and Mozilla Thunderbird.
Step 5: Apply the Additional Features of the Software
Step 6: Click Browse to browse and choose your preferred saving location, and click the Start Export button to begin conversion.
Step 7: Monitor and Complete the Conversion Process
After clicking Start Export, track the migration progress and review the conversion details in real time.
Step 8: Once the conversion completes, the software displays, “All selected data has been exported successfully." You can even use the additional options to proceed further.
Step 1: Download and launch the Aryson OLM Converter Tool on your system.
Step 2: Add the required OLM Files
Use the available options to load Outlook for Mac OLM files into the software.
Add the desired OLM file(s), verify the details, and click Proceed to preview and convert the data.
Step 3: Preview & Search OLM Mailbox Data
The Advanced Preview Panel displays the following details:
The Date, To, From, and Subject fields of the email. Along with that, the following details are displayed as well.
Step 4: Mark the Export to Email Clients radio button and select Microsoft 365 as the destination.
Step 5: Authenticate an active Microsoft 365 account
You may choose the A or B login method to log in to the Microsoft 365 account using valid credentials.
Step 5(A): Use OAuth 2.0 Authentication

Step 5(B): Use an Application Credential
Enter Azure Application Details
Fill in the following information from your Azure app registration:
| Field | Description |
|---|---|
| Microsoft 365 Admin Account | Admin email address |
| Application (Client) ID | Azure App Client ID |
| Client Secret | Secret generated in Azure |
| Tenant ID | Microsoft Entra ID (Azure AD) Tenant ID |
If you choose Application Credentials Authentication (Client ID, Client Secret, and Tenant ID), you must first create an Azure App Registration and assign the required API permissions in Microsoft Entra ID (Azure AD).
For complete instructions on creating the Azure Active Directory application and enabling API permissions, visit:
Create Azure Active Directory and Enable API Permission Guide
In the guide at step 17, you need to add the required API permissions. The image below lists all the API permissions that must be configured for successful authentication and migration.
Step 5(B): 1: Choose Mailbox Mapping Mode
Step 5(B): 1.1: Migrate All Files to Selected Mailbox(es):
Select Destination Microsoft 365 Mailboxes
Note:
Import Users via CSV
Step 5(B): 1.2: Map Each File to Specific Mailbox(es):
Step 6: Return to the Application & Configure Migration Settings & Filters
Step 7: Configure Advanced Migration Filters
Step 8: Click Start Export to begin the OLM to Office 365 migration conversion process.
Step 9: Monitor and Complete the OLM to Office 365 Migration
After clicking Start Export, monitor the mailbox transfer progress and review migration statistics in real time.
Step 10: Once the conversion completes, the software displays, “All selected data has been exported successfully." You can even use the additional options to proceed further.
Step 1: Download and launch the Aryson OLM Converter Tool on your system.
Step 2: Add the required OLM Files
Use the available options to load Outlook for Mac OLM files into the software.
Add the desired OLM file(s), verify the details, and click Proceed to preview and convert the data.
Step 3: Preview & Search OLM Mailbox Data
The Advanced Preview Panel displays the following details:
The Date, To, From, and Subject fields of the email. Along with that, the following details are displayed as well.
Step 4: Mark the Export to Email Clients radio button and select IMAP as the destination.
Step 5: Configure IMAP Server and Authenticate/p>
Step 6: Apply the Additional Features of the Software
Step 7: Click on the Start Export button to begin the OLM to IMAP migration.
Step 8: Monitor and Complete the OLM to IMAP Migration
After clicking Start Export, monitor the mailbox migration progress and review transfer statistics in real time.
Step 9:Once the conversion is complete, the software displays, “All selected data has been exported successfully." You can even use the additional options to proceed further.
Step 1: Download and launch the Aryson OLM Converter Tool on your system.
Step 2: Add the required OLM Files
Use the available options to load Outlook for Mac OLM files into the software.
Add the desired OLM file(s), verify the details, and click Proceed to preview and convert the data.
Step 3: Preview & Search OLM Mailbox Data
The Advanced Preview Panel displays the following details:
The Date, To, From, and Subject fields of the email. Along with that, the following details are displayed as well.
For personal Gmail accounts:
Step 4: Select Gmail app authentication or OAuth 2.0 under the Export to Email Client option.
Step 5: Authenticate your Gmail Account
Step 5.1.1: For Gmail App Authentication:
Note: Make sure to first log in to your Gmail account in the browser to securely authenticate. Otherwise, the migration process will not continue.
Step 5.1.2: For Gmail OAuth 2.0:
Step 5.2: Select the required Gmail account as per the requirement or click on the Use another account option to add another account.
Step 5.3: Click Continue if you agree to OLM Converter’s privacy policy and proceed further.
Step 5.4: After authentication, the browser window displays "Received verification code. You may close this window."
For Business or Enterprise Mailboxes:
Step 4: Select Google Workspace under the Export to Email Clients drop-down list.
Step 5: Log in via the workspace admin account and JSON key and click Authenticate. You can generate a JSON file with the help of the detailed guide.
Step 6: Map OLM Files to Google Workspace User Accounts
Associate the selected OLM file with the corresponding Google Workspace mailbox before starting the migration.

Step 6: Configure Migration Settings
Step 7: Click on the Start Export button to begin the OLM to Google Workspace/Gmail migration.
Step 8: Monitor and Complete the OLM to Google Workspace/Gmail Migration
After clicking Start Export, monitor the migration progress and review transfer statistics in real time.
Step 9: Once the conversion completes, the software displays, “All selected data has been exported successfully." You can even use the additional options to proceed further.
After downloading the Aryson OLM Converter Tool, you will find the welcome screen as played below.