To backup IMAP mailboxes to PST, you can use reliable third-party tools like Shoviv IMAP Backup and Restore Tool. This software enables users to securely export all IMAP mailbox data, including emails, attachments, calendars, and contacts, into Outlook PST format. The tool supports multiple IMAP accounts simultaneously, ensuring efficient bulk backups without data loss. It offers advanced features like incremental backup, scheduling, and filtering to customize the process. Users can easily access PST files in Microsoft Outlook whenever needed. With its user-friendly interface and high-speed performance, Shoviv ensures a seamless and secure IMAP to PST backup process for all users.