Learn How to Perform Zimbra to Microsoft 365 Migration; A Step By Step Guide

Written By Mohit Jha
Anuraag Singh
Approved By Anuraag Singh  
Published On September 11th, 2023
Reading Time 7 Minutes Reading

Summary: This write-up outlines the most reliable and secure step-by-step approach to perform a batch migration from Zimbra to Microsoft 365. Moreover, we have also addressed the common challenges and provided the respective resolution. Go through this guide and learn about pre-migration planning, including account data collection, email size considerations, and stakeholder communication.

We know that Zimbra is the most resilient and favored email client. But, there are companies who are choosing Microsoft Office 365 over it. There are plenty of reasons for this including easy and better upgrades. Office 365 efficiently fulfills all the needs of an email client application. Hence, making users perform Zimbra to Office 365 migration.

Subsequently, in this article, we will elucidate the methods that a user can opt to migrate Zimbra mail to Office 365 account. Besides this, we will also know the reasons behind this migration and planning before starting the process.

Why Migrate Zimbra Mail to Office 365?

For every business, it is necessary to have effective and precise management of data. There are numerous factors that contribute to this migration. A few of them are in the adjacent section of the write-up.

  1. A large group of users is moving to the cloud environment. We know that MS Office 365 is the best available cloud-based suite that makes users migrate Zimbra emails, contacts, calendars, tasks, etc.
  2. Microsoft 365 offers an extensive range of functionalities and an easy, interactive, and intuitive graphical user interface to work on.
  3. Moreover, Office 365 offers a pay-as-you-go policy making it a subscription-based model. Thus, a user can invest their money in other avenues as well for growth.

After reading the advantages of the O365 platform, go through a user-based scenario for Zimbra to Office 365 migration in detail.

User Query: Recently, I bought a new plan for Microsoft Office 365 platform and decided to migrate all my data from Zimbra mailboxes to it. The biggest dilemma I am facing is that I have no clue how to perform this migration. Also, since I have a large mailbox size, I want to do the whole process in one go. So, please suggest the best solution, if any for batch Zimbra to Microsoft 365 migration.

Like prior user queries, there are a lot of users who are struggling with similar issues like how to export Zimbra Mailbox to PST format. So, without any further ado, let us find a suitable solution to perform the migration in a hassle-free manner.

5 Quick Steps to Migrate Zimbra to Microsoft Office 365

  • Step 1. Download, Install & Run Tool on PC.
  • Step 2. Select IMAP & Office 365 Platforms.
  • Step 3. Login & Validate with Credentials.
  • Step 4. Create Mapping to Add Users & Validate.
  • Step 5. Click on Start Migration Button.

Zimbra to Office 365 Migration Pre-Planning 

Before starting the migration process, it is quite necessary to plan everything in advance. Planning will save you time during migration confusion and it even helps in preventing data loss chances. So, there are certain points that you should plan before moving further to the solution, like-

  • Details of both Zimbra Mail and Microsoft 365 user details, and all credentials.
  • List the number of mailbox emails with attachments you want to migrate.
  • Keep in mind the email size limit of the Office 365 account to prevent any issues during Zimbra to Office 365 migration.
  • It is better to have a backup of your existing mailbox emails at the source.
  • Also, before starting the migration, make sure to communicate the migration plan to all end users and inform the stakeholders.
  • Additionally, generate a list of all data and permissions from the source Zimbra account.
  • All user mailboxes must be created on Microsoft 365 and you must assign licenses to them as well.
  • Be sure to check network capacity and bandwidth to migrate data.
  • Also, go for test migration before starting the actual migration.

Migrate Zimbra to Microsoft Office 365 Using a Professional Solution 

The IMAP to Office 365 Migration Tool is an error-free solution with a set of unique features to make the entire Zimbra to O365 migration easy. Also, it has an interactive graphical user interface so that a non-technical user can also operate it, without any trouble.

Besides this, it renders a free edition that can be downloaded to know all the functionality of the tool in advance. After a complete evaluation, users can upgrade the same to the full licensed version. Using this smart and self-oriented tool, one can easily perform a batch migration of accounts.

Furthermore, a technical support team has been incorporated to assist you, 24/7.

Noteworthy Features of Software to Perform Seamless Zimbra to Microsoft 365 Migration

The below section of the blog comprises the functionalities offered by this extraordinary automated tool.

  • Interactive GUI – The tool offers an interactive and easy interface for easy operation.
  • Safe Migration – Using this tool, users can migrate email from Zimbra to Office 365 with attachments in a trouble-free manner.
  • Filtering Options – For selective migration, the tool offers a date-based filter to migrate the email data falling in that range only.
  • Compatibility – The Zimbra to Office 365 migration tool is fully functional with all the versions of the Zimbra email client, Windows OS, and Mac operating systems.
  • Folder Hierarchy Maintenance – The software ensures that all of your data remains intact even after the completion of the migration procedure.
  • Keep Information Secure – Moreover, this software is even best to work with because it never keeps the user account information in its storage.
Read More: Learn how to migrate Gmail emails to Office 365 accounts seamlessly.

Working Steps to Migrate Zimbra Mail to Office 365 Directly

Download and install the above-suggested software on supported Windows OS from the activation key that you get and then follow the steps –

Step 1. Run the application on the respective Windows computers, and select IMAP and Office 365 as source and destination platforms from the interface.

download zimbra to office 365 migration tool

Step 2. Then, select the email category and apply the date filter to migrate Zimbra Mail emails and their attachments of a specific time period.


Step 3. Now, select the Other option for the source account, enter the Zimbra user details, and authenticate the permissions.

zimbra to office 365 migration

Step 4. Thereafter, select the Office 365 option and provide the details of the required user accounts, and allow permissions.


Step 5. In this step, click on the Fetch User to select the file from your desktop location path, validate them, and proceed.


Step 6. Finally, hit the Start Migration button to initiate the Zimbra to Office 365 migration successfully of all Zimbra Mail emails.

zimbra to office 365 migration

The Final Verdict

The above blog explains the best method to migrate Zimbra mail to Office 365 platform. Users can download the free trial version of the tool to know the functionality without any investment in it. The free trial version of this Zimbra to Office 365 migration tool will help you for a limited trial. So, all the users can get the tool to perform the migration as required on the supported version of the respective operating system.

Read More: Learn how to Add WorkMail Emails to Gmail Account Quickly.

FAQs Regarding Zimbra to Office 365 Migration

Q1. How do I migrate Zimbra mail emails to Microsoft 365 on Mac?

  • Step 1. Download the Mac-based Tool.
  • Step 2. Select Zimbra Mail as the Source.
  • Step 3. Choose Office 365 as the Destination.
  • Step 4. Tap Advanced Settings & Apply Filters.
  • Step 5. Tap on the Start Migration Button.

Q2. How many emails can I transfer to the Office 365 mailbox?

One can migrate multiple emails from Zimbra to O365 accounts in one go, using the above-recommended software for any operating system. In case of specific emails to be moved, the tool offers to set the date range as per the requirement.

Q3. Does this tool require any details before Zimbra to Office 365 migration?

No, it does not require any user details of an account, however, there are some prerequisites that you need to follow as per the operating system you are using.


By Mohit Jha

Mohit is a Microsoft Certified Expert who wears multiple hats as a writer, researcher, and editor. He's really into cyber security, cloud computing, and digital forensics. These topics get him excited and push him to go beyond just his job. His big goal is to create super well-researched and carefully written articles that help readers learn important technicalities.