How to Export Office 365 Mailboxes to PST – Complete Tutorial

Tej Pratap Shukla ~ Modified: October 3rd, 2021 ~ Office 365, Outlook ~ 11 Minutes Reading

This Quarter Microsoft provided new numbers i.e. 155+ million Microsoft 365 (previously known as Office 365) commercial users and 32.5+ million consumer subscribers. And this graph is increasing day-by-day. Look to know more in brief

With Microsoft’s Office 365, one can access their mailboxes anytime on any device. This is because of its advanced and overwhelming features which make it stand apart from other enterprise-level applications. This article is more focused on how to export Office 365 mailboxes to PST format as Microsoft does not provide any native backup option.

We will talk about step by step solution of resolving error while exporting Office 365 mailboxes using eDiscovery PST Export Tool, Powershell misconception to download Office 365 mailbox, contacts, the calendar to PST. Also, about SysTools Office 365 Exporter a brilliant Tool for users & Admin.

Free Download Purchase Now

5 Steps to Export Office 365 Mailbox to PST are:

  1. Step 1: Install Software & Enter Admin Credentials
  2. Step 2: Select Folders to Export
  3. Step 3: Choose “Export Type” & “Apply Filter”
  4. Step 4: Click on “Start” to Export Office 365 to PST
  5. Step 5: Finally, Click on “Save Report” button

mvp review

Table of Content:

The following write-up will discuss the process to export Office 365 mailbox to PST including Emails, Contacts, Calendars, etc. locally. Let us explore the table of content:

Why we need to Export Office 365 Mailbox items

Generally speaking, I am a huge fan to export Office 365 mailboxes to PST file format when needed to create pst from office 365 mailbox. See below how exporting Office 365 Online / On-premises  will help you in different scenarios

  • A critical situation where you need archive Office 365 mailbox to PST data for Legal / Audit purpose
  • An Office 365 admin account got hacked by an anonymous person or group
  • Not Depending only on Microsoft to control your data
  • Want to keep Mails & Documents for a longer period of time
  • Data Loss due to accidentally deleting O365 account items
  • Permanently delete an O365 User or Ex-Employee account
  • Requirement to backup of Office 365 shared mailbox to pst
  • Cloud Ransomware attack result in encryption of business account data

Exporting data from Office 365 to PST is a great solution, that will help a particular user or admin of an organization to avoid or overcome the above situations.

Quick Ways to Export Office 365 Online Mailbox to PST Format

Now, there are two top methods used to export Outlook 365 mailboxes to PST format. The steps are quite complex and require adequate technical knowledge to perform the same.

How to Export PST from Office 365 Online Using eDiscovery Method

Microsoft has not designed any specific tool especially to download Office 365 mailboxes and other items to PST format (like New-MailboxExportRequest) command

So, eDiscovery Content Search is only the manual approach available for the user to export Office 365 mailbox to PST. This will enable users to download and protect their Outlook 365 Online data.

Requirements to use eDiscovery Content Search & Export Utility

  • Discovery Management group
  • To Export search result to PST needed Window 7 OS or later.
  • Needed Microsoft .NET Framework 4.5 or later must be installed
  • The latest version of Internet Explorer or others must be installed
  • Permission must be assigned for Office 365 OWA export to PST

Below elaborated step-by-step solution for Admin to export O365 mailboxes to PST using eDiscovery PST Export Tool.

Important: eDiscovery can also be to export on-premises Exchange 2016 / 2013 mailboxes.

Step 1: Firstly, you need to login to your Office 365 account and launch Microsoft 365 Admin center

Login to Admin Centre

Step 2: From the Admin centers, click on the Security and Compliance option

export o365 mailbox to pst

Step 3: Under the Security and Compliance section, select Permissions option and Drag to eDiscovery Manager.

Take permissions

Note: Now, to access various eDiscovery features, it is important to be a member of the eDiscovery Manager role group.

Step 4: After that, Checkbox beside eDiscovery Manager, Next Edit icon to add the important roles which are required for the Discovery Management group

Step 5: Generally, the role group is assigned to the following roles i.e., Case Management, Compliance Search, Export, Hold, Preview, Review and RMS Decrypt

Step 6: Suppose if, the Export role is missing, click Edit role group and add the same.


edit role group


Step 7: The Role is assigned, now, Drag Down to Search and Investigation and select the Content search option


search content


Step 8: From the new window, click on the New search option which is available in the latest version of eDiscovery Content Search.


new searches

Step 9: After that, specify the data to be exported from Office 365 mailboxes to PST file format in the search window. The user can Add conditions to make Office 365 search process more accurate as per need. As you can see there are multiple items available to filter search emails and other items.

add conditions

Step 10: To Export Office 365 mailboxes to PST from all mailboxes, select Specific locations and Modify.


search query

Step 11: Now, choose emails or specify the mailboxes using Choose users, groups option

Step 12: One can also export mailboxes from SharePoint and Public folders by enabling Public folders option

modify locations

Step 13: The Search option renders multiple other filtering options such as, Equals Any of and many more which selectively exports the contents

Step 14: In order to download all Outlook 365 mailboxes to PST in bulk, do not add any conditions or keywords, simply click on Save and run button. On which, the tool will prompt to enter the name of the search

save search

Step 15: Once the Save button is clicked, the tool will start the search in the background.

export office 365 emails

Step 16: Preview all the search results you want to export as you can see below.

Export Office 365 Mailboxes to PST

Step 17: Now Go back to saved searches and Select Folder name to export Office 365 Online Mailbox to PST. As we have selected the Export PST file, one can check the status of the search with all the details concerning the search result. To do that, click on the More menu and choose the Export results option.

export to pst

Step 18: From Export results wizard, select the radio button according to the requirement. Make sure that you do not check Enable deduplication option unless there is a need to search results which are required to be exported to a single PST file

Step 19: After the required settings are done, click on the Export button at the bottom of the window. To Start exporting process. Next Close this Tab.


Step 20: In order to check the export progress, go back to the searches and click on the Export tab.

export tab

Step 21: Before the export process gets completed, a user can click Download results button which will begin downloading the results.

export key

Step 22: Ensure to copy the Export key which is required in the Click Once/eDiscovery application to export Office 365 Mailboxes to PST

key changed

Step 23: Then, paste the copied export key under the Paste field and select the desired folder to save the PST file

export office 365 archive to pst

Step 24: At last, click on the Start button to begin the export process which will download Office 365 Mailbox to PST file format.

Errors you might face while Exporting Office 365 to PST via eDiscovery

Below errors can come if eDiscovery is not configured properly:

  • eDiscovery PST Export Tool Stuck Calculating Error

export office 365 archive to pst

  • Can not Start Application Error in the end. (eDiscovery Export Tool download fails)

Cannot start Application

  • You can’t start the eDiscovery PST Export Tool from the admin center in Office 365 Online

export o365 mailbox to pst

How to Export Office 365 Mailbox to PST Using SysTools in Single Click

Users often raise concerns for the above-mentioned manual methods. Considering the growing needs of the user, SysTools Office 365 Export is a complete remedy to perform the export from Office 365 mailboxes to PST / EML/ MSG format quickly without facing any technical or non-technical problems. To export on-premises, data use  Export Exchange Mailbox to PST tool by SysTools.

Moreover, Office 365 user can export its own mailbox and archive mailbox without Admin account. Whereas, Admin Impersonation allows to download Office 365 normal user mailbox, archive mailbox and shared mailbox to PST and other file formats. It is designed keeping in mind the various restrictions that are imposed in the manual methods.

This tool does not compromise on the integrity of the data as it ensures to maintain data integrity. Moreover, a user can run this software on any version of Windows operating system, including the latest Windows 10.

Detailed Explanation to Export Office 365 Online Mailbox to PST

export office 365 online archive to pst

Step 1 : Firstly, install the software on the system and provide the credentials for the Office 365 user account and click on the Sign In button

export o365 shared mailbox to pst

Step 2 : The tool shows the folder hierarchy for the respective User ID wherein a user can easily select the folders to export Outlook 365 mailboxes to PST. Now, the eDiscovery PST Export method fails to display this folder structure.

export o365 mailbox to pst

Step 3 : The tool provides impressive features where it renders three different formats i.e., PST, MSG and EML to export mailboxes from office 365 admin center.

Step 4 : A user can either choose selective data items from the Select Categories field. Or to export all data items, select Archive Mailbox option to export PST from office 365 web deleted emails (In-place archived Mailbox).

export office 365 archive mailbox to pst

Step 5 : Date-filter option allows setting a date-range where the data will be exported as specified in the filter


Step 6 : One can split the resultant PST file Using the Split Options for Outlook data file option. Ensure to specify the file size after which the PST file will be split.

Note: For the complete step-wise guide to export Outlook 365 Online mailbox to PST format using user and Office 365 admin account, please visit the following site.

Features Offered By Automated Tool 
  • Export emails in PST, EML, MSG file formats
  • Split PST option to generate variable size .pst files. 
  • Export archive mailbox to PST from Office 365 user account
  • Export Office 365 shared mailbox to pst using Admin impersonation
  • Download Office 365 mailboxes according to certain date-range
  • Offers Naming Convention option to archiving emails in EML, MSG formats. 

Misconception: Export PST from Office 365 Mailbox Via Powershell

First thing there is no such option available to directly export PST from Office 365 online mailbox via PowerShell. There is no such PowerShell cmdlet command available in Office 365 (like New-MailboxExportRequest command ).

If the user wants to export Office 365 online mailbox to PST for free then using eDiscovery PST Export Tool is the only the solution. Other methods are also there, that technically sounds solution to export Outlook 365 mailboxes. Those are:

  • Using Powershell command user can synchronize Office 365 Outlook Online account with desktop-based MS Outlook. And then using Import / Export feature one can export Office 365 emails to PST using Outlook.
  • Script delegation full access, Outlook Online bind to delegated mailbox and export to PST. Technically very likely possible but I think, no one ever tried to do it. Well, after trying scripts, I found that it is quite complex to Export PST.

So to make the task easy It’s recommended to use the automated solution over other methods.

Let’s Sum Up

Users are constantly searching for how to export Office 365 mailboxes to PST file format. The manual method discussed in this blog is quite complex. Moreover, a novice user fails to implement these approaches. Therefore, for an effortless process to export Office 365 online to PST, use the automated tool as discussed above. It is a proficient tool which does not require much technical knowledge. Moreover, one can smoothly dowload PST from multiple Office 365 user accounts without posing any technical discrepancies.

Frequently Asked Questions

Q: Is it possible to export Office 365 archive mailbox to PST?

A: Yes, using SysTools Office 365 Export software you can easily export exchange online archive to PST, MSG, EML file format while maintaining the folder hierarchy.

Q: Can I export multiple Office 365 user’s account mailboxes to PST format?

A: Yes, this software allows you to transfer multiple O365 user’s mailboxes to PST.

Q: Do I need Admin credentials to export my Office 365 account data?

A: No, Admin credentials is necessary to export multiple user’s accounts. You can easily export single account data by un-checking Is Admin while login into your account using this tool.

Q: What type of files I can Backup from Office 365 Account?

A: You can backup Office 365 mailboxes, Contacts, Calendars, Tasks to Outlook PST, EML, MSG formats using Office 365 Export Wizard.

Q: Can I use this tool to export Office 365 shared mailbox to PST?

A: Yes, while using admin impersonation (Is Admin), the tool allows you to select a shared mailbox. You can select the desired shared mailbox to export it into PST format.