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Outlook Import OST Data to Office 365 – A Complete Guide

Ritu Roy | Email Conversion email migration How to's Outlook Software Technology | 5 minutes read | Last updated on February 9th, 2023,
outlook import ost data to office 365

Here in this blog, we will talk about how to import Outlook OST data to Office 365 account. I discuss two different ways of importing OST files to Exchange Online (Office 365). If you are planning to perform Outlook import OST data to Office 365 process, then this post will definitely help you.

How Can I Import Outlook OST Mail to Office 365 Cloud?

There are no direct methods to import OST files into Office 365 Webmail account. But if you still want to achieve Outlook import OST data to Office 365 process, then you have to save OST file as PST file format. After that, you can manually move PST files into Office 365 by following the Network upload method. And you can also choose a third-party tool or direct solution – OST File to Office 365 Software for importing OST files direct into Office 365 account.

There are a number of third-party solutions; CubexSoft OST Converter is one of them. It will help you to save OST files into Office 365 cloud platform along with all emails, tasks, appointments, emails attachments, contacts, notes, etc. in a well-precise way.

Here I am going to brief two methods of Outlook import OST data to the Office 365 account. So, read both the methods and select a suitable one for your data conversion.

Solution #1. Manually Import Data from Outlook Offline File to Office 365

It is the indirect solution to import OST data to Office 365 account. First, export the OST files PST file format. Then, you have to move the PST file into the O365 account.

Part 1. Save OST Data as PST File Format

  1. Open Outlook, go to File >> Import and Export.
  2. Choose Export to a File and hit on the Next.
  3. Then, go to Personal Folder File (.pst) >> Next.
  4. Now choose email or folder, and check on the Include Subfolder >> Next.
  5. Now, browse the location where you need to save the file, check the option of “Replace duplicate with items imported”, and press on Next.
  6. Now add the password (if you want, others skip it), and click on OK.

Note: If Exchange Server is offline or you are unable to connect to the server, then this time provided method will helpful. In that situation, simply use OST to PST Software, a perfect way to import OST file to PST without any error.

Part 2. Import PST into Office 365 Cloud Platform

  • First of all, login to the Office 365 account >> Admin Center>> Exchange.
  • Now, the Exchange Admin Center window will display>> Permission>> double click on the Organization. Management a new window shows >> + sign >> choose Mailbox Import Export >> Add >> Ok.
  • After that, choose the Mailbox import export again and >> Save.
  • Now, go to the Admin Center>> Setup >> Data Migration >> click on Upload file.
  • Then press on the New Import Job>> type the job name >> Next.
  • Check on Upload Your Date>> Next.
  • Now, you will see a window; just hit on the Show Network Upload SAS URL. Then copy the URL and paste it into the notepad >> Download Azure AzCopy. Hit on the Run and the tool gets installed.

Note: While you are moving PST files to Office 365 cloud, just provide the permission of the folder or file, which you need to import and copy the Network Path.

  • Open the Microsoft Azure AzCopy tool and type hereAzCopy.exe /Source: \Network Path or File location /Dest:”SAS URL” /V: location path where you want to save the log file /AzCopy.log /Y

Sample Code:

  • Press the Enter
  • After uploading the PST file, make a CSV file to map the PST file into the mailbox account.
  • Now, open the import data window and check on both options and >> Next.
  • Hit on the Select Mapping file >> Upload CSV file >> Validate>> Save.
  • Your PST file was successfully uploaded into Office 365 >> Close.

Solution #2. Outlook Import OST Data to Office 365 Using OST Mailbox Converter Software

As we can see, the above-mentioned solution is very tough, problematic, and time-taking. Therefore, if you don’t know the Azure AZCopy tool or Powershell Commands, then I will recommend that you try the OST Mail Conversion Software. This is a GUI-based application that permits the moving of OST file data into an Office 365 mailbox in a few clicks only. The best part of this software is that you can perform Outlook import OST data to Office 365 Primary mailbox as same as Archive mailbox as per your need. The OST to Office 365 Tool is a very simple and reliable to use application, which does not need any PowerShell commands.

Software’s Working Steps to Upload Outlook OST File to Office 365

Instantly convert all data of your OST mailbox such as emails, contacts, calendars, tasks, appointments, and meetings to an Office 365 (Exchange Online) account by following the below-given steps:

Step 1. Download and Install the software on your PC.

Step 2. Launch it on your desktop and hit on the Select Files and choose Add Files…, Add Folder…, or Load Outlook Profile option to upload OST data for conversion.

Step 3. After that, the software will show a complete folder list of added OST mailboxes. Then, choose the folders which you want to convert.

Step 4. Now, select the Saving Option as Office 365 to achieve OST file to Office 365 conversion.

Step 5. After that, enter the login ID and password of your Office 365 account and choose sub-options such as Ignore Systems Folder Hierarchy, I am Admin option, Change Language, etc. You can select as per your necessity and click on Connect

Step 6. When you hit Connect button, the program will start connecting to Office 365 cloud and open the screen of Mailbox Mapping. It will display three tabs that contain OST users, Office 365 users, and choose. Hit on the Select tab, then select the required Office 365 account in which you wish to import OST data.

Now press on the Convert to start OST data file to Office 365 direct conversion. Once the tool accomplish the process, it will show a success message, then click on OK

The Concluding Words

In this blog, I have mentioned two possible methods of importing OST data to Office 365 cloud. The first method is quite time-taking, and the second method is very quick for Outlook import OST data to Office 365 process. Therefore, you can go with a solution according to your needs. If you want to check the software working before getting it, then you can first use its FREE OST File Converter download version, which allows importing a few items from OST file to Office 365 account without cost.