Are you having Zimbra webmail account but now thinking to switch into Office 365 environment for official purpose? Looking for a technique to backup Zimbra Mail Server to Office 365? If yes, then no worries at all because in the following section we have discussed the powerful approach which will surely help you to backup Zimbra mailboxes to Office 365 in a bulk at once.

These days, when competition is so high, users need to keep business planning up to date in order to make their business run. This involves the updating of email clients. Zimbra is one of the popular emailing programs, which is common among business organization to send/receive critical information across the globe. Zimbra formerly known as ZCS that stands for Zimbra Collaboration Suite. Because, it provides collaborative services to users such as Zimbra Desktop, Zimbra Web Client and Zimbra Email Server. It helps to manage multiple IMAP, POP3, SMTP, Gmail and other accounts in single environment. One can even retrieve mails of Zimbra app in both offline and online mode and also able to view the same on multiple platforms such as Linux, Windows, and Mac etc. However, Zimbra Desktop is now discontinued and so most of the users are utilizing Zimbra Email Server to manage their day-to-day emails.

Office 365, on the other hand, is a cloud-based platform. It is a Microsoft product and contains all the items that are available in Microsoft Office for desktop. It allows users to access data anytime and from any platform. Its basic subscription plan provides accessibility of MS Office applications like PowerPoint, Excel, OneNote, Access etc. and other services that ease the organization workflow and help users to transfer the data immediately from one place to another.

Reasons for Zimbra Mail Emails Backup to Office 365

Zimbra Desktop is a cross-platform email application. However, it is still losing its market place, why? Because many advance email clients are coming up with more remarkable functionality and features. Many users want the program, which gets updated time to time, but after gaining popularity for few decades, Zimbra has stopped its upgrade. It has slow response time and provides long configuration process. Apart from this, it has slow synchronization process and frustrates users who want to do everything in a quick speed. There are many more points that pressurize users to move on cloud platform, which is more secure and can be accessed anytime regardless of any platform you are using.

Now, if a user has deleted Zimbra account but still there are Zimbra supported files, which needs to retrieve in Office 365 environment, then in that case, Zimbra to Office 365 Tool is needed. However before, discussing the migration process of Zimbra to O365, let us first know the procedure of how to access TGZ folder of Zimbra?

How to Extract data from Zimbra Desktop?

There are using who are not aware of how to extract data from Zimbra and in what extension it is stored. Follow the steps and you will get to know how to extract Zimbra data.

  1. Open Zimbra Desktop and click Preferences button.
  2. Select Import/Export.
  3. A new window will appear asking to select the required data types such as contacts, emails, calendar, briefcase that you want in resultant file.
  4. Click Export, select Save File option.
  5. Choose the location to save the Zimbra data and click Save.
  6. Process will start and save all the data in zip TGZ file.
  7. Now go to the location and check extracted Zimbra .tgz file.

After extracting Zimbra database, download Zimbra to Office 365 Converter and perform the process of Zimbra backup data to Office 365.

Zimbra to Office 365 Converter for Zimbra Backup Data to Office 365

CubexSoft Zimbra to Office 365 Migration Tool is a strong migration utility to batch import Zimbra TGZ folder to Exchange Online account with complete user database. It includes two options to save Zimbra mailboxes to Office 365 – Zimbra on Premise Mailboxes and Zimbra Cloud Hosted Mailboxes. The Zimbra On-Premise Mailboxes will help you to backup Zimbra extracted TGZ folders. And Zimbra Cloud Hosted Mailboxes option will help to backup Zimbra webmail emails directly into Office 365 environment. The application provides easy working interface, which is operated by all professional and home users. With the help of Zimbra to Exchange Online Migration Tool, one can backup unlimited Zimbra data to O365 at one time and in an accurate way. Follow the process and implement the task of Zimbra email backup to Office 365:

Step 1. Open Zimbra to Office 365 Converter. Choose Zimbra Cloud Hosted Mailboxes and click Next.

home screen

Step 2. Enter Zimbra Cloud credentials in required fields with IMAP Host and Port Number. Click Login button. Quick Note. You can click on Use Batch Mode option if you want to backup Zimbra emails to Office 365 in a batch.

select email source

Step 3. If you have chosen Use Batch Mode property, then you will get Add CSV option with the help of which you need to upload a CSV file containing Zimbra email ID and password. It will help you batch import Zimbra user account into Office 365 at once.

click add csv

Step 4. Now, the Zimbra Web Client is connected with the tool and its mailboxes will appear on the left pane of the software.

select email source

Step 5. Go to Select Saving Options property to choose Office 365 option.

select email source

Step 6. Set the options of Office 365 as per your need and hit Backup button. Quick Note. You can also use Filters option tab if you want to backup selective Zimbra mailboxes to Office 365.

ofice 365 options

Step 7. The process will start quickly and end by displaying “Conversion Completed Successfully” message on the screen. Click OK and the tool will automatically open log report which will be shown to users in a text-based format.

backup done

Now you can go to Office 365 account to check the result. However, you will see that the data appearing after migration is accurate and even the data integrity is also precise.


The article mentioned here has discussed a wonderful technique to import Zimbra on-premise and Zimbra cloud hosted mailboxes into Office 365 account. The process is easy and very secure to use. Moreover, the results delivered by the tool will also be 100% accurate. Download the CubexSoft Zimbra Converter free demo edition on any version of the software, which is available to check the entire software migration process. It allows to backup 25 Zimbra webmail emails to Office 365 free of cost.