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Migrating Pegasus Mail to Office 365 can be done efficiently by using the MacSonik IMAP Backup Tool, which supports direct IMAP-based migration between email platforms. Since Pegasus Mail and Office 365 both allow IMAP access, the tool creates a secure connection to Pegasus Mail using the correct IMAP server details, username, password, port number, and SSL settings. Once logged in, it scans the mailbox and displays all folders in a structured preview panel, enabling users to select specific folders or emails for migration. After this, Office 365 is chosen as the destination, and users authenticate using their Office 365 credentials or an app password if multi-factor authentication is enabled. The tool then performs a direct server-to-server transfer, moving emails from Pegasus Mail into the corresponding Office 365 folders without requiring any manual file conversion. Throughout the process, the MacSonik IMAP Backup Tool preserves the original folder hierarchy, email headers, attachments, timestamps, and read or unread status to ensure complete data integrity. In addition, it offers advanced features such as selective migration, date-range filtering, exclusion of spam or duplicate emails, and support for large mailboxes, making the migration faster and more organized. Secure SSL/TLS encryption protects data during transfer, while the user-friendly interface allows even non-technical users to complete the migration smoothly. Overall, the MacSonik IMAP Backup Tool provides a reliable, secure, and time-saving solution for transferring Pegasus Mail to Office 365 without data loss or disruption.

Step 1: Launch the Tool

• Open MacSonik IMAP Backup Tool
  
• Select IMAP as the source email service
  

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Step 2: Login to Pegasus Mail (IMAP)
Enter Pegasus Mail IMAP credentials:

• IMAP Server (e.g.,
  imap.yourserver.com
  )
  
• Username
  
• Password
  
• Port (usually
  143
  or
  993
  for SSL)
  
• Enable SSL/TLS if required
  

Click Login.

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Step 3: Preview Pegasus Mail Folders

• The tool will fetch all Pegasus Mail folders
  
• Select specific folders or choose Select All
  
• Preview emails to confirm correct data selection
  

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Step 4: Choose Office 365 as Destination

• Select Office 365 as the export option
  
• Enter Office 365 credentials:
  • Email ID
    
  • Password
    
• If MFA is enabled, use an App Password
  

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Step 5: Apply Advanced Filters (Optional)
Use filters to control migration:

• Date range (From–To)
  
• Exclude deleted or spam folders
  
• Migrate only unread or flagged emails
  

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Step 6: Start Pegasus Mail to Office 365 Migration

• Click Start Backup / Export
  
• The tool will migrate Pegasus Mail emails directly into Office 365 folders
  
• Progress and status logs are shown in real time
  

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Step 7: Verify Migration

• Login to Office 365 (Outlook Web or Desktop)
  
• Check folder structure and email integrity
  
• Confirm attachments and timestamps
  

Also Read: Transfer Pegasus Mail to Office 365