How to Import PST to Shared Mailbox Office 365 Effortlessly?

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Written By Mohit Kumar Jha  
Anuraag Singh
Approved By Anuraag Singh  
Modified On October 29th, 2025
Reading Time 12 Minutes Reading

Are you looking to import PST to Shared mailbox Office 365 but unsure where to start? You are in the right place. In this guide, we’ll explain four secure and efficient methods to import PST to Office 365 mailbox with attachments, contacts and emails along with step-by-step instructions. By the end, you will get to know exactly which methods suit your needs best for a smooth process.

PST is an important and the default file format of MS Outlook. The main concern is that its data i.e. emails, events, etc., are stored locally which often leads to issues like malware attacks, file corruption and storage limitations. To overcome these, importing PST into shared mailbox in Microsoft 365 ensures that your data remains safe, under security and accessible to authorized users anytime.

4 Different Ways to Import PST to Shared Mailbox Office 365

There are 4 different methods including manual as well as automated approaches available to export PST files from your local system to Office 365.

  1. Import/Export Wizard
  2. Drive Shipping Method
  3. Network Upload Method
  4. Using Professional Software

Now, let’s briefly discuss the complexity level of each method.

Microsoft offers three native methods for its users. Among these, the Import/Export method is comparatively easy and the simplest manual approach. However, there are a lot of downsides present for all the manual methods that we will discuss in more detail in the upcoming sections.

Secondly, the Network upload method is the most complex manual process to carry out and requires technical expertise in the PowerShell language. This method is mainly for large import.

Next, the Drive shipping method has its own limitations and it costs admin $2/GB to import PST files.

Last but not least, we are also going to discuss automated software which is designed in a way that caters to all requirements of users while importing PST to Shared mailbox Office 365. It gives you complete control over migration and helps to overcome these challenges hassle-free.

Now, let’s have a closer look at each method step-by-step.

Method 1 – Import PST File to Shared Mailbox Via Outlook

Before moving forward to the steps, first, you should make sure that you have already configured your Outlook account. If you didn’t set up the same, then follow the below steps.

  1. Open MS Outlook on the desktop and click on File>> Add Account.
  2. Then, enter your Office 365 email address, and hit Continue
  3. Now, add the password and click on OK>> Finish.
  4. Office 365 is now set up in your Outlook. Now, you can import the PST file to Outlook 365 online.
  5. After that, execute the procedure.
  6. Thereafter, on the top left side of your screen, you will find the File tab, click on it, and select Open & Export>> Import/Export.
    import/export option
  7. In the Import Export Wizard window, choose Import from another program or file > click Next.
  8. Then, choose Outlook Data File (.pst) > click Next.
    select outlook data file
  9. Then, click on the Browse button to select the PST file you want to import. And, choose the desired radio button>>Next.
  10. If you want to import the complete file, select the root file and tick the Include subfolders checkbox. Now, select the radio button ‘Import items into the same folder’ and add your Office 365 account ID.
  11. Finally, click Finish to import PST to Shared mailbox Office 365.

Also Read: How to Import PST File into Outlook Web App?

Limitations:

  • This method requires a complex configuration and required technical expertise.
  • You need to have desktop-based Outlook installed on your system.
  • It’s quite a lengthy process, to begin with, and there is a high chance of human error.
  • If you have files in TB size then it is not a suitable approach. As it can consume a lot of time than usual.

Method 2 – Import PST to Office 365 Mailbox Using Drive Shipping

The tech giant offers a native approach i.e. ‘Drive Shipping’ for its users to export Shared mailbox to PST Office 365. You can bulk import PST files by following the below steps:

  1. Copy the Outlook PST file onto a drive, and encrypt it with passwords for data security.
  2. Manually ship it to the Microsoft data center.
  3. Then, Microsoft will validate the files.
  4. Once the verification is done, it will import PST to Shared mailbox Office 365.

Drawbacks:

  • Microsoft made this method available to limited countries across the globe.
  • The cost associated is completely dependent on the size of the PST file. Since organizations deal with data in terms of TBs, this method will not be a cost-effective method.
  • If you are curious about the numbers, then let me tell you, the tech giant charges $2 USD/GB of data. 
  • Now, you can do the math that if you wish to ship 1TB of PST files then you will have to pay $2000 USD which is not pocket-friendly.
  • Also, you can ship a maximum of 10 drives at a time.
  • Suppose your PST file contains 300 or greater subfolders, then you can not import it using the Drive Shipping method
  • Not to mention, it’s a time-consuming process and inconvenient approach.

Also Read -: How to Export Office 365 Mailbox to PST? Explained in Detail

Method 3- Network Upload Method to Import PST to MS Shared Mailbox

It is a Microsoft-supported approach to import PST to shared mailbox Office 365 in batch. In this process, you upload your PST files to Microsoft Azure cloud storage and then import into the desired mailbox using the Microsoft Purview portal. Look at the below steps for more clarification.

  1. Download AzCopy tool from Microsoft official site.
  2. In the Microsoft Purview portal, create a new import job to get a Secure Access Signature (SAS) URL. It is a temporary secure link to upload PST files.
  3. Open Command prompt and use AzCopy to import files to Microsoft cloud storage via SAS URL.
  4. Make a simple CSV file that specifies the shared mailbox as destination for the import job.
  5. Last, go back to the Purview panel, upload the CSV meaning file and start the import job.
  6. Microsoft will then move your PST data into the shared mailbox Office 365.

Major Downsides:

  • You can not upload PST files having a size of more than 20 GB
  • This method is no longer valid if you are not technically sound.
  • Uses a complex PowerShell scripting language and takes a huge amount of your time.
  • There is a risk of losing your valuable data or data corruption if you enter the wrong in-line command.

After reading till now, you must be curious to know about the automated approach since all the above manual methods have their own set of limitations. Let’s move towards it. 

Method 4 – Tried & Tested Software to Import PST into Shared Mailbox

With the help of this software, you will overcome almost all the downsides of manual methods. Moreover, the easy-to-do steps will seamlessly import your PST files to the desired Office 365 mailbox in no time.  The SysTools Import PST to Office 365 Tool is recommended by many experts for its ease of use. Plus, it supports powerful yet clean interface to enable all users to import PST to shared mailbox Office 365 directly. 

Download the free demo version of this software:

Download Tool Purchase

Some of the Note-Worthy Software Features

These software features not only collectively enhance efficiency but also provide complete control while importing PST to shared mailboxes, catering to diverse organizational needs seamlessly.

  • Allows to import multiple PST files into Office 365 mailboxes.
  • Plus, provides date filter for emails, contacts, calendars, etc., for selective import.
  • Allows you to import PST files to Shared mailboxes and In-Place archive mailboxes.
  • Provides three different ways to map PST data to specific Office 365 user accounts.
  • Incremental import support for adding new PST data to existing Office 365 mailboxes.
  • In addition, it does not impose any data size limitation while importing PST files.
  • Offers detailed and summary reports post-import for auditing and compliance purposes.

Pre-Requisites of The Above Software

  • Set Admin Impersonation rights in the Exchange Admin Center.
  • Add Mailbox Import Export role to the Discovery Management Role Group.

Admin Impersonation for importing pst to shared mailbox

  • Then assign UserMailbox permissions to the Admin account.

import pst to shared mailbox using software

Software Steps to Import PST to Mailbox Office 365

1. Choose Outlook as the source platform and Office 365 as the destination platform.

import pst to shared mailbox using software

2. On the same screen, select the categories that you wish to import into Office 365, located under Workload Selection. 

upload pst to shared mailbox

3. After that, use the Date-Range Filter to selectively import mailbox data based on dates. Then, click Next.

import pst to shared mailbox in o365

4. You will now be directed to the Source screen. Here, select the folder path where the Outlook PST files are stored.

Organize PST files in folders named after the target O365 email IDs as follows:

Create a folder in the root drive, such as E:/PST/[email protected]/ (place all user1’s PST files here)

And so on…

Then, select the folder “E:/PST/” in our tool as the Import Folder Path.

upload pst to shared mailbox

5. Thereafter, click Validate to ensure that the necessary permissions have been granted to the files. After validation, click Next.

import pst to shared mailbox

6. Enter the Office 365 admin email account and application ID for the destination. Click Validate to confirm the credentials.

pst to shared mailbox

7. Then, On the Users screen, you have multiple options to add users from the source account that needs processing:

  • Fetch Users -: Automatically fetches users from the Source.
  • Import Users -: Imports users through CSV.
  • Download Template -: Downloads a template for creating a CSV file.

Select the suitable method according to your requirements.

upload pst to shared mailbox in o365

8. The list of source users is displayed on the screen. You can search for a specific mailbox and select that user for data import. Use the Show Selected toggle bar to display only the selected users, facilitating selective data import.

upload pst to shared mailbox

9. Now, users need to add destination user accounts. You have two options for this:

  • User List Template – Provides a sample CSV file for manually adding source users.
  • Import Users – Imports users through CSV.

Template Download

10. Next, click Validate to authorize the selected user source and destination accounts. Once users are validated, click the “OK” button.

Users Validated

11. Users can prioritize the import task. Select accounts based on priority as shown in the image.

Priority Import
12. Finally, click the Start Import button to initiate the import process.

upload pst to shared mailbox in office 365

Conclusion

In conclusion, since the Personal Storage Table (PST) files are prone to corruption, especially when they are large. Hence, to safely keep your important emails and documents, it’s wise to import PST to shared mailbox Office 365 as it offers better data security features. For any query, related to the software, contact our support team anytime. They are always available for you and your queries.

FAQs: Import PST to Office 365 Mailbox

Q1. How can I create a shared mailbox in Office 365?

To create a shared mailbox, you should be the Office 365 administrator. Or you must have administrator privileges.

Here are the steps to follow:

  1. Firstly, login to your Microsoft 365 account and navigate to the admin center.
  2. Navigate to Teams & Groups from the left-hand menu. Now, click on Shared mailboxes.
  3. After that, Click on Add a Shared Mailbox and fill out the required information, including the display name and email address.
  4. Click Add to create the shared mailbox.

Q2. Is it possible to import a PST file to a shared mailbox in Office 365 using the web interface?

Unfortunately, it’s not possible to import a PST file to a shared mailbox using the web interface. Moreover, you’ll need to use PowerShell to complete the import. However, if you opt for the above-mentioned software then you can do it in just 5 steps:

  1. Download, Install & Launch the Tool.
  2. Select Outlook & Office 365 as Platforms.
  3. Thereafter, enable Desired Workload & Set Date Filter.
  4. Validate Source & Destination Platforms.
  5. Last, choose Users & Click on Start Import.

Q3. What permissions do I need to import a PST file to a shared mailbox in Office 365?

To import a PST file to a shared mailbox in Office 365, you need to have the Mailbox Import Export role assigned to your account. You can assign this role using the Exchange admin center or PowerShell.

Q4. Can I import a PST file to a shared mailbox in Office 365 if the mailbox is already in use?

Yes, it’s possible to import a PST file to a shared mailbox in Office 365 even if the mailbox is already in use. However, the import may cause temporary disruptions to the mailbox, so it’s best to schedule the import during a time when users are less active.

Q5. How long does it take to import a PST file to a shared mailbox in Office 365?

The time it takes to import a PST file to a shared mailbox in Office 365 depends on the size of the file and the speed of your network connection. A large PST file can take several hours or even days to import.

Q6. How can I verify that the PST file was imported correctly to the shared mailbox in Office 365?

If you have imported using the manual approach then you can use PowerShell to check the import request status and review the mailbox contents to ensure that all data was imported. Meanwhile, if you are using the above-mentioned tool then the tool will generate a detailed, summary report that you can check to verify the imported data.

  author

By Mohit Kumar Jha

Mohit is a Microsoft-certified expert who has assisted thousands of clients with Outlook & Microsoft Office 365 issues. He enjoys writing on email clients as well as data migration. He is always excited about giving troubled readers the most up-to-date knowledge, explanation, and refinements.

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