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How to Move Pegasus Mail to Office 365?

Bhawna Barwal | Email Conversion email migration file conversion How to's Software Technology | 4 minutes read | Modified on: 25-03-2026

Ever wondered how to move Pegasus Mail to Office 365? If yes then we are going to discuss a manual method to migrate Pegasus Mail to Office 365 and also a direct method that can quickly import batch emails to Office 365 at once. Migrating from legacy email clients to advanced cloud-based platforms has become a necessity for individuals and organizations alike. Pegasus Mail, once a popular email client, is now often replaced by more advanced and collaborative solutions like Office 365. However, transferring emails from Pegasus Mail to Office 365 is not always straightforward because Pegasus Mail stores data in a format that is not directly compatible with Office 365.

Manual Method to Migrate Pegasus Mail to Office 365

Step 1: Locate Pegasus Mail Mailbox Files

  1. First, you need to find where Pegasus Mail stores your mailbox data.
  2. Open Pegasus Mail
  3. Navigate to the mailbox directory (usually under the user folder)
  4. Identify files with extensions like .cnm, .pmm, or mail folders
  5. Make a backup of all files before proceeding.

Step 2: Convert Pegasus Mail Files to MBOX

Pegasus Mail does not provide a direct export to MBOX. So, you’ll need go through with extra steps:

Method A: Using IMAP Account

  1. Configure an IMAP enabled email account (like Gmail) in Pegasus Mail
  2. Create folders in the IMAP account
  3. Drag and drop emails from Pegasus Mail folders into IMAP folders
  4. Allow synchronization to complete
  5. Now your emails are stored on the IMAP server.

Step 3: Export Emails to MBOX via Thunderbird

  1. Install and open Thunderbird
  2. Configure the same IMAP account used earlier
  3. Wait for all emails to sync
  4. Install the ImportExportTools NG add-on
  5. Right-click on folders > Export >Choose MBOX format
  6. You will now have your emails in MBOX format.

Step 4: Migrate Pegasus Mail to Office 365 with Automated Pegasus Mail to Office 365 Tool

CubexSoft MBOX Converter helps you to migrate email data stored extracted from Pegasus Mail into Office 365 mailboxes. The tool allows to add email data from MBOX files and directly import it to Office 365 accounts while preserving the original structure and integrity. It ensures that emails, attachments, metadata (To, From, Subject, Date), and folder hierarchy remain intact after migration. The tool works for both Windows and Mac Operating Systems. And demo version of the tool converts 25 emails from Pegasus Mail into Office 365 without any charges.

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How to Move Pegasus Mail to Office 365? –  Working Steps

  1. Install and open MBOX to Office 365 Converter
  2. Now, Load MBOX Files. User can select one or multiple MBOX files from their system.
  3. Users can preview emails, attachments, and folder structure.
  4. Choose Office 365 saving option and fill the required details.
  5. Apply filters such as date range, sender, or subject can be applied to migrate only relevant data.
  6. Now just choose the path for the output and click on the Convert.

Key Advantages of Opting for Pegasus Mail to Office 365 Tool

  • Direct emails migration to Office 365
  • Preserves folder hierarchy and metadata
  • Supports bulk migration hence it can import multiple emails at once.
  • Reduces risk of data loss
  • Saves time and effort
  • Complete Data Migration
  • Transfers emails, attachments, contacts (if supported), and metadata
  • Preview Before Migration, as it allows users to view MBOX file contents before exporting
  • Ideal for enterprise-level migrations
  • Selective migration is possible through filters like date, subject, sender, or folder
  • Ensures safe and authorized access
  • Handles large MBOX files efficiently
  • Generates migration logs and reports
  • Supports MBOX files from Thunderbird, Apple Mail, Entourage, etc.
  • User-Friendly Interface best for non-technical users

What are the Limitations of Manual Method? – Why Automated Software Works

While the manual approach works, it comes with several drawbacks:

1. Time-Consuming

The process involves multiple steps and tools, making it lengthy.

2. Risk of Data Loss

Improper handling may lead to missing emails or corrupted data.

3. Requires Technical Knowledge

Users must be comfortable configuring IMAP, using Thunderbird, and handling file conversions.

4. No Batch Processing

Manual migration is inefficient for large volumes of data.

Read more

How to Import MBOX in Foxmail

Conclusion

Migrating from Pegasus Mail to Office 365 may seem complex due to incompatible file formats, but using MBOX as an intermediate format makes the process achievable. The manual method involves multiple stages hence it is not advisable to opt for it. Also, the process can be time-consuming and technically demanding. If you’re handling large volumes of data or require a faster, more reliable solution, using a professional Pegasus Mail to Office 365 Converter is the better option. This suggested software solution is an essential tool for individuals and organizations looking to move from MBOX-supported email clients to Microsoft 365. With its automated process, advanced filtering, and secure migration capabilities, it simplifies what would otherwise be a complex and time-consuming task. The tool runs on all versions of Mac OS for example Monterey, Catalina, High-Sierra, Mojave, and many more. And it also works for Windows OS versions like Windows 10, 11, 7, 8, etc. The tool’s free demo option makes it feasible to import 25 mails from Pegasus Mail to Office 365 free of cost.