Not many discussions online cover Pegasus Mail migration because it’s such an old client. However, small firms and freelancers who relied on PMail for decades now want to move to modern platforms for remote collaboration and cloud accessibility. When trying to migrate Pegasus Mail to Office 365 manually, I realized that format compatibility is a major bottleneck and that integrity isn’t guaranteed. I landed on the SysInfo IMAP Backup Software, mainly because of its Authentication & Secure Server Connectivity features. The tool authenticates through browser-based OAuth for Office 365, ensuring compliance with Microsoft’s security requirements. That’s a major plus because most legacy tools still rely on simple username-password authentication. Additionally, mailbox selection, preview, and filtering made it easier to skip obsolete folders. For anyone tired of outdated infrastructure, this method provides a modern, secure pathway to cloud transformation.

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