How to Import/Upload & Save Bulk OST Emails to Office 365?

Microsoft developed the immensely popular cloud service Office 365. You can effortlessly access Microsoft's best apps, including Word, Excel, Outlook, Lync, OneNote, PowerPoint, and more, on any device and from any location with the aid of this service. Following its launch, a large number of Exchange users began transferring their Exchange mailboxes to Office 365 accounts, and the number of Office 365 subscribers is growing daily. Yet, moving Exchange OST data to Office 365 is a difficult task.

This article will go over how to manually import OST files into Office 365 as well as how to use third-party tools to transfer OST files to Office 365.

How Can I Manually Migrate My OST Files to Office 365?

The straight manual migration of OST to Office 365 is not yet possible. To utilize this method, you must first convert an OST file to a PST file. Then, you can upload an OST file to Office 365 using the Microsoft Network Upload method.

First, convert OST files to PST Files

• Launch Microsoft Outlook, then select File.
• Choose the Import & Export option after selecting the Open & Export option.
• After choosing Export to a file, press the Next button.
• Choose the Outlook PST data file.
• Click Next after selecting the directories you wish to export and checking the box to add sub-folders.
• After selecting an export location, press the Finish button.

Note: The user account must be linked to the Exchange Server for this export method to function.

Step 2: Put PST files into Office 365.

• Open your Office 365 account and log in.
• Visit the Exchange Server Admin Center.
• Choose Permissions from the Exchange Admin Center window, then double-click on Organization Management.
• Click the "+ sign" and choose Mailbox Import Export from the newly shown pop-up.
• Select OK after clicking Add.
• Select Mailbox Import Export once more, then click Save.
• Proceed to the administrative center.
• Choose Setup and then Data Migration.
• Select the file to upload by clicking on it.
• Choose "New Import Job."
• After entering the job name, select Next. Make use of underscores, hyphens, digits, and lowercase letters.
• In the Do you wish to upload or ship data? window, choose Upload Your Data, and then click Next.
• Click the Show network upload SAS URL link on the Import data screen.
• Make a copy of the displayed SAS URL.
• To download and install the utility, click the Download Azure AzCopy button.
• Go to the location where you installed the AzCopy.exe file.

Execute the subsequent command:

• AzCopy.exe /V:{Log file location> /Y /Source: /Dest:
• The command runs and displays status messages.
• To import the PST files, create a CSV file listing the user mailboxes. (Get an example CSV file here.)
• Once you've finished uploading your files and have access to the mapping file check boxes on the Import Data screen, click the Next button.
• Choose a CSV mapping file by clicking the +Select mapping file option on the Select mapping file window.
• Select "Validate." When the file is successfully validated, the name changes to green, and you click on the validate file.
• Select "Save and Close" after clicking.

Note: This is a lengthy and intricate process. You should use the Softaken OST to Office 365 Migration Tool if you lack technical expertise. This software makes it simple & hassle-free to convert OST files to Office 365.

To Import OST Files into Office365, Use Third-Party Tool Softaken

• Install the Softaken OST to Office 365 utility after downloading it.
• Choose an OST file by clicking the Add File option, then click OK.
• The program will produce an extensive view of your data after the loading procedure is complete.
• Select Export Selected Folders or Export All Folders by clicking on the Export option.
• Choose the Office 365 export option.
• After deciding on a place for the log file, press the Next button.
• Choose the Export to Primary Mailbox or In-place Archive Mailbox option from the Export to Office 365 window.
• Choose the option to create a new folder and give the folder a fitting name. (That folder will hold all of the data.) Press the next button.
• To begin the OST to Office 365 migration procedure, finally, enter your Office 365 login information and select Sign in.
• Upon completion, verify your Office 365 account.

Note: Enterprise and commercial licenses include this feature.

Additional Beneficial Aspects

• Exchange Server Live and Office 365 can import OST files.
• There are more possibilities for filtering and searching to convert data selectively.
• For the first few items in each folder, a free OST to Office 365 transfer is offered.