How to Export Emails from Roundcube to Outlook 365 – 2026 Guide

Written By Md Shoaib
Updated on May 21st, 2026

5/5 - (1 vote)

Emma’s Query: “I need to move all my Roundcube emails to Outlook 365 for backup. Is there any simple way to export Roundcube to Office 365 without losing attachments or folder structure?”

Introduction: Thinking about moving your emails from Roundcube to Microsoft 365? A lot of users do this when they need better storage, easier access, and Microsoft apps in one place. But the real problem starts during migration. Emails, attachments, and mailbox folders can easily get messed up if the process is not done properly. In this blog, we’ll show both the manual method and an easier way using the CloudMigration IMAP Backup Tool to Export Emails from Roundcube to Outlook 365.

Quick Solutions:

Download win Buy Now for win Download Mac Buy Now for Mac

Table of Contents

Why Users Move from Roundcube to Outlook 365?

Roundcube is a popular webmail client offered by many hosting providers. It works well for basic email management, but businesses often switch to Microsoft 365 for advanced productivity and enterprise-level features.

Common Reasons for Roundcube to Microsoft 365 Migration

Better mailbox security and compliance.
Cloud-based email accessibility.
Large mailbox storage capacity.
Advanced spam and threat protection.
Easy integration with Teams, SharePoint, and OneDrive.
Centralized admin management.
Improved collaboration for organizations.

Can I Migrate Roundcube Emails to Office 365 for Free?

Yes, users can migrate Roundcube emails to Office 365 for free by configuring both accounts in Outlook using IMAP settings & manually transferring emails. However, the manual method can be time-consuming for large mailboxes. Using the CloudMigration IMAP Backup Tool makes the process faster & easier by securely transferring Roundcube emails to Office 365 without losing attachments or folder structure.

Native Approach to Export Roundcube Email to Office 365

Roundcube itself does not store emails independently. It works through an IMAP mail server. Because of this, users usually migrate mailbox data using an IMAP-supported email client like Outlook.

01 Step: Add Roundcube Email Account to Outlook

First, open Microsoft Outlook on your system.
Then, go to File -> Add Account.
Now, give your Roundcube email address.
After that, select Advanced Options.
Next, choose Let me set up my account manually.
Then, select IMAP as the account type.
Afterward, provide the IMAP & SMTP server details provided by the hosting provider.
Finally, tap Next and complete the login process.

02 Step: Configure Outlook 365 Account

Now, again open File >> Add Account in Outlook.
Then, provide the Microsoft 365 email address.
After a successful login, allow Outlook some time to sync the mailbox properly.

03 Step: Transfer Roundcube emails to Office 365

After both accounts are configured, open the Roundcube mailbox folders in Outlook.
Then, select the emails/folders you want to transfer.
Next, drag & drop them into the Microsoft 365 mailbox folders.
Finally, wait until the synchronization process completes successfully.

Loopholes of the manual method:

Although the manual process works for small migrations, it also has several drawbacks.

Requires technical configuration knowledge
Time-consuming for large mailboxes
Risk of synchronization failure
Chances of duplicate emails
Manual folder mapping required
Migration speed depends on internet connectivity
Difficult for bulk mailbox migration

Professional Solution to Export Emails from Roundcube to Outlook 365

Many users use the CloudMigration IMAP Backup Tool when they do not want to configure everything manually. It can move emails from Roundcube to Office 365 directly. The tool also supports other migrations, like Migrate IMAP to Zoho Mail. It keeps email folders, attachments, and message details during the transfer process. This is helpful for users handling large mailboxes or multiple email accounts.

Verified Steps: Migrate Roundcube to Office 365:

Download and launch the IMAP Backup Tool. Click Continue.
Next, give your IMAP email credentials and sign in to your account.
After login, preview and select the mailbox data and click Next.
Now, select Office 365 as the email client and tap Next.
Then, sign in and choose the desired User ID.
After that, select the mailbox folders. Press Next.
Finally, apply filters or features and click Start Process.

Real-Life Scenario :

David was working as an IT administrator in California and used Roundcube for everyday office emails. Over time, the mailbox became crowded with client conversations, attachments, and old records. His team also needed to Export IMAP Email to CSV files for reports and data tracking. Later, the company shifted to Microsoft 365. He tried the manual migration approach first, but for users, it was slow & hard to handle for such a large mailbox. In the end, he used the CloudMigration IMAP Backup Tool to transfer the emails more smoothly without disturbing the mailbox structure.

Why Professional Tools Are Better for Enterprises?

Multiple IMAP accounts can be migrated together using a CSV file.
Users can Convert IMAP Emails to PDF, PST, and other formats.
You can filter emails by date range.
Duplicate emails are skipped.
Emails can be moved without attachments if needed.
Folder structure stays the same during migration.

Final Conclusion

In this blog, we looked at different ways to export emails from Roundcube to Outlook 365. The manual method works, but it has several steps and can be tricky if you are not used to it. It also takes more time when the mailbox is large. The CloudMigration IMAP Backup Tool makes the process simpler and quicker. In the end, it depends on what people need, but the tool is easier for most users.

Frequently Asked Questions

Q1. Can an IT administrator export emails from multiple Roundcube accounts to Outlook 365 simultaneously in an enterprise environment?

Ans. The CloudMigration IMAP Backup Tool supports bulk migration, allowing administrators to transfer multiple Roundcube mailboxes to Outlook 365 in one operation.

Q2. How does the Roundcube to Outlook 365 migration tool handle large enterprise mailboxes exceeding 20GB without data loss?

Ans. Large mailboxes can be migrated securely using the CloudMigration IMAP Backup Tool while maintaining attachments, mailbox folders, and email properties properly.

Q3. Is it possible to export only specific date ranges of Roundcube emails to Outlook 365 for compliance audits or legal hold requests?

Ans. Date-filter options in the CloudMigration IMAP Backup Tool allow users to export selected Roundcube emails required for audits, compliance checks, or legal records.

Q4. Can the enterprise migration tool preserve complete folder hierarchy, subfolders, and email metadata when exporting Roundcube emails to Outlook 365?

Ans. During migration, the CloudMigration IMAP Backup Tool keeps folder hierarchy, subfolders, attachments, timestamps, and other important email metadata unchanged.

Q5. How can enterprises migrate Roundcube emails to Outlook 365 without disrupting active employee workflows or requiring system downtime?

Ans. Enterprises can use the CloudMigration IMAP Backup Tool to migrate emails smoothly without affecting employee mailbox access or interrupting daily business workflows.

Q6. Can the Roundcube to Outlook 365 migration tool also transfer contacts and calendar data alongside emails?

Ans. Along with emails, the CloudMigration IMAP Backup Tool also supports migration of contacts and calendar data from Roundcube to Outlook 365 accounts.

Q7. How does the enterprise migration tool handle duplicate emails when exporting Roundcube accounts to Outlook 365?

Ans. Duplicate handling features in the CloudMigration IMAP Backup Tool help prevent repeated emails from transferring during Roundcube to Outlook 365 migration tasks.

Q8. Is the Roundcube to Outlook 365 migration secure, and how are employee credentials protected during the export process?

Ans. Secure authentication methods are used by the CloudMigration IMAP Backup Tool to protect employee credentials during Roundcube to Outlook 365 migration procedures.

About The Author:

Md Shoaib

Hi, I’m Md Shoaib! I enjoy writing about technologies and helping my readers with their queries, and I’m always looking for new ways to challenge myself and grow. Professionally, I work as a Digital Marketer, where I specialize in SEO and Copywriting.