Are you planning to move from Mozilla Thunderbird to Microsoft Office 365? The Regain Thunderbird to Office 365 Migration tool provides a seamless and efficient solution to migrate your entire mailbox—including emails, attachments, contacts, and calendars—without any data loss or file corruption. Designed for individuals, professionals, and IT administrators, this tool simplifies the transition from a desktop-based email client to the cloud-powered Microsoft 365 environment.

Why Use Regain Thunderbird to Office 365 Migration Tool?

Thunderbird stores its data in MBOX format, which is not natively supported by Office 365. Manual methods are often complex, time-consuming, and prone to errors. With the Regain MBOX Migration tool, you can directly transfer Thunderbird mailboxes to Office 365 in just a few clicks—no technical skills required.

The tool also supports migration to other email platforms like Exchange Server, Gmail, Yahoo Mail, Zoho Mail, Rediff Mail, Yandex Mail, GoDaddy, Outlook/MSN/Hotmail, Hostinger Web Mail, and all IMAP-supported accounts, making it a highly versatile solution.

How Thunderbird to Office 365 Migration tool Helps

The software not only migrates emails but also maintains the original folder hierarchy, metadata (To, From, Cc, Bcc, Date), and read/unread status. It provides flexible export options in formats such as vCard (VCF), ICS (Calendar), EML, EMLX, PDF, HTML, MSG, MBOX, TGZ, and more—offering users complete control over their email data.

Key Features:

Direct migration from Thunderbird to Office 365
Preserves all email properties and attachments
Supports batch migration of multiple profiles
Filters to migrate specific folders or date ranges
No size limitations and ensures 100% data accuracy

Working Steps to Import Thunderbird to Office 365

Install and open the Regain Thunderbird to Office 365 Migration tool.
Auto-detect Thunderbird profile or manually add MBOX files.
Preview the mailbox content before migration.
Enter your Office 365 credentials and select the destination folder.
Apply filters (optional) and click on “Start Migration.”

In just a few minutes, your complete Thunderbird mailbox is securely transferred to Office 365. Whether you’re migrating a single account or handling a business-wide move.

Regain for Thunderbird to Office 365 MigrationRegain Software & Tools

Regain for Thunderbird to Office 365 Migration

Regain Software & Tools

Regain for Thunderbird to Office 365 Migration

Regain Software & Tools

Regain for Thunderbird to Office 365 Migration
Regain Software & Tools