Well, it’s happening again -transformations. These days we have been looking at new features and widgets of Office 365 and the whole suite commonly known as O365 is pulling a large number of people towards itself. Now prominent email users are commonly going through the process to upload MBOX to Office 365. Because the addition of features and widget would continue to show a new angle towards the cloud. Migrate MBOX to Exchange Online is quite a lengthy process. In this particular segment, we would be covering steps to migrate data from Thunderbird to Office 365 so that they can easily switch their account but the method is somewhat similar to other MBOX file format users. To import MBOX file to Office 365 user first need to know the requirements and advanced features of cloud. This will help them to better understand why the migration of the medium is important for them.

Why to Import MBOX into Office 365

MBOX Office 365 migration is the last step that should be made to action but before that user needs to know the adroit features of O365. The reasons behind to upload MBOX to Office 365 are listed below:

  • First and Foremost important feature of Office 365 is that it not only restrict to Outlook but also to multiple services and applications.
  • More secure and fast to access data anytime, anywhere with an authorized person.
  • Services like Yammer, Sharepoint, e-Discovery helps the user to get a versatile field in Office 365 to avail multiple opportunities.

How to Upload MBOX to Exchange Online

The process of migration is actually a three-step process, in which user need to go through a lot of harsh steps. Follow these steps that will help you to migrate from MBOX to Exchange Online.

Step1. Export MBOX Files to EML File

  • Launch Mozilla Thunderbird and then navigate to folder containing email
  • Choose emails to export to EML
  • Then, right click on those highlighted emails and Save them in EML format
  • Now, emails are saved in EML format at the destination

Step2. Transfer EML Files in Windows Live Mail

  • Now, launch Windows Live Mail and choose to contain EML files saved above and Open it
  • Now, select all those EML files to be converted into PST
  • Then, click Ok
  • Note: The above method is only valid for Thunderbird email client

Step3. Convert PST to Office 365

  • Users can migrate PST files to Exchange Online by Drive Shipping or through Network Upload. For drive shipping firstly, user have to store PST files on the hard drive and then physically ship the drive to Microsoft data center
  • And for Network upload firstly user have to install Azure AzCopy
  • Then upload the PST to Office 365
  • Create the PST importing mapping file and then create a PST import job in Office 365
  • Lastly, Filter the data to start the PST import.

Upload MBOX to Office 365 Rapidly!

If the user will follow these steps that are mentioned above then it would take him a lot of time and effort to actually execute all these steps. The process to migrate MBOX to O365 can be done with a help of a software that is reliable and fast. Client can use a reliable tool MBOX to Office 365 converter that will help them in uploading MBOX to Exchange online Account in Bulk rapidly. The advanced feature of the tool like converting corrupted data, migrating subdirectories and maintaining folder structure are one of the most loveable among users. If the user goes through the manual process they may not get results but the tool will guarantee import MBOX to PST format easily.


In this section, we have covered the needs of the user to upload MBOX to Office 365 because later or sooner that whole business sector users would be switching to cloud. Both manual and automated solutions help the user to import MBOX into O365 but the condition is that user must know how to implement the steps.