Best Ways to Import Organization’s PST files to Office 365

  Admin |   16-Aug-21

Here in this article, I am going to discuss the best techniques to Import Organization’s PST files to Office 365 (Microsoft 365). First, let’s know the importance of Office 365 and why people choose Exchange Online over another email client. Microsoft is known for creating powerful products that are very advantageous in our day-to-day work environment. Each of us uses some of its products like Excel, Word, PowerPoint, etc. All these products are so useful that you cannot think of a life without them. These are highly beneficial to manage our data. Microsoft has provided solutions in almost all the areas such as education, digital media, maintenance, and administration, etc. They have their own self-developed multiple operating systems. With each product, it offers various facilities that make the work of the user easier and convenient to use.

The outlook is one of the well-known desktop-based email clients that is widely used all over the world with the Exchange Server to provide a protective layer making the entire organization secure. Office 365 is a cloud platform that consists of various applications like MS Outlook, OneDrive, OneNote, Excel, Yammer, etc. on a single platform. In Exchange Online (Office 365), you can manage entire things in one place. In addition, Office 365 is more advanced and highly secure than Microsoft Outlook.

Why Office 365?

Below are the important features of Exchange Online that depict why one should choose Office 365 over any other email client or platform.

Remote Solution: As you, all know that Office 365 is a cloud-based platform and hence offers solutions remotely. It increases productivity for your organization by improving work quality. Exchange Online helps keep your data secure from virus attacks, power failure, etc. It never distracts the continuity of your business.

Versatile in Nature: It means Office 365 is accessible from anywhere in the presence of an Internet connection. It makes you remain up-to-date with all your work does not matter where you are. You can access your data through either phone, laptop, or desktop.

Easy to start with Office 365It means there are no complex tasks to use Office 365. You just need to create an account and start with the O365. You even do not require a license to install it as Office 365 automatically includes all licenses once you create an account.

Robust SecurityExchange Online offers a powerful security feature that is why an unknown person can’t access or view your data. Office 365 data can only be access by the Admin and its users. You can even enable or disable the permissions of each user. There is also the feature to set the retention policy for your data.

Provides Controlling Power: It means an Administrator can add or remove any users anytime. Admin can also set a filter for each Office 365 member. You can enable the archive mailbox for selected members; assign Impersonation rights to chosen members, etc. You can create new roles in organization management. In this way, you can control the whole Exchange Online account.

Better Collaboration: You can easily collaborate with your people of the organizations located in any place of the globe. It also offers faster and effective communication through a secure transfer of documents, files, images, presentations, etc. You can even communicate with a quick chat process and through videos.


Now, let’s see the steps required to migrate .pst files to Exchange Online mailboxes manually.

You can choose a suitable method to migrate your Outlook PST file emails, contacts, tasks, notes, tasks and calendar items, etc. to Office 365 cloud environment.

  • Using Network upload Method
  • By using Import/Export Wizard
  • By using IMAP Migration
  • Using third-party application


Methods to Import Organization’s PST files to Office 365

Using Manual Upload Method

1) Assign sharing permission to Outlook PST file

The very first process in starting the manual technique to transfer PST into Exchange Online is providing the sharing permission to the PST folder or the file that you need to transfer to the cloud mailbox of Office 365.

  • Right-click the PST file or the folder that needs to export.
  • Go to Properties, and under Sharing Tab, hit Share.
  • Select Everyone from the drop-down and then Add &
  • Finally, choose the folder and click the Done

2) Add Mailbox Import Export Role

The second important step is the assigning of import-export role to organization management either using PowerShell or the Exchange Admin center. Below is the process to provide the import/export role via PowerShell.

  • First, enter the below command to connect PowerShell to MS Office 365 remotely.

$o365Cred = Get-Credential

Now, enter the Exchange Online Admin Username and password.

  • Secondly, execute the command:

$Session=New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri -Credential $o365Cred -Authentication Basic –AllowRedirection


  • Assign the new PSsession using the given command

Import-PSSession $Session


  • Provide the mailbox Import/Export to Exchange Online organization management.

New-ManagementRoleAssignment -Role “Mailbox Import/Export” -SecurityGroup “Organization Management” -Name “Mailbox Import/Export”


  • To assign the import/export role to the user’s mailbox, enter the below command:

New-ManagementRoleAssignment –Role “Mailbox Import Export” –User “username”


3) Perform Network Upload Process

  • Go to the Security and Compliance page, click on Information governance, and then select Importà Import PST files.
  • Hit on the option +New Import Job. Enter the desired PST import job name and click
  • Choose Upload your data and then hit Next. A new page will appear; get the SAS URL and the Azure tool.
  • Execute the command to export the Outlook PST file to the AzCopy tool; Enter the actual PST Network path, paste the copied SAS URL, and the path to save log file.


AzCopy.exe /Source: PST network path /Dest: ”SAS URL” /V:  location to save log file \AzCopy.log /Y


  • Once executed, the PST file gets uploaded to the Azure location temporarily.
  • Now create the CSV, select the two checkboxes in the import data page and click Next for the mapping of the Outlook PST file. Browse the CSVà Validate—> Save and Close.
  • On the Import job page, hit on the option Ready to Import to Office 365. A filter page will appear, choose the required option and hit the Next


With the help of Outlook Import/Export

This is one of the simplest ways to perform the Office 365 Import PST process. Below are the steps to perform PST upload to O365 via Microsoft Outlook.

  • Open Microsoft Outlook email client in the system. Click on the file option–> Open & Export–> Import/Export.
  • A new wizard will appear. Select Import from another program or file and then click Next.
  • Again, on the new import a file window, select the Outlook data file (.pst) option and hit on the Next.
  • Now, click the browse button to search and select PST and then click the Open
  • Select do not import duplicates, click next and finish.


Using IMAP Migration

  • For an IMAP migration, the first step is the domain verification and creating of users in Office 365. The user also needs to create a CVS file with an email address, username and password.
  • The second step is the creating and verifying of endpoints for the IMAP migration connection. Here, the user needs to give the details of the IMAP server.
  • Now, start with creating the batch for IMAP migration choosing the option “Migrate to Exchange Online”, select IMAP migration, and Next.
  • Browse the created CSV fileà Next and then again click the Next button. Select the created mailbox, enter the batch name and click Next.
  • Choose Automatically start the batch à New and wait till the status changed from syncing to synced.
  • Route the exchange email to Office 365 and delete the IMAP migration batches.


Via Office 365 Import PST Tool

The third-party application is the secure professional way to Import Organization’s PST files to Office 365 mailbox. There are numerous solutions to export PST to Office 365 accounts.



Final Verdict: Here, in this blog I tried to explain all the process to Import Organization’s PST files to Office 365. User can choose any of the technique and implement it according to their comfortability. All methods are useful and the successful solution to migrate Outlook PST files to Exchange Online.


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