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How to Backup Shared Mailbox in Office 365; Step By Step Explained

Nilesh Kumar | Modified: June 5, 2023 | Email Tips | 10 Minutes Reading

Short summary: This write-up focuses on the queries asked by Office 365 users i.e. “How to backup shared mailbox in Office 365?“ Follow the steps illustrated to execute this complex task without any errors or data loss.

User Query: I need to backup some shared mailboxes in Office 365, I am trying to export Office 365 mailbox to PST using the eDiscovery method. But it’s really frustrating as the eDiscovery Export tool is not responding and freezes at the last minute. So, I am in search of the best possible solution as I have so multiple shared mailboxes to backup. Please suggest any alternative to this method. Thanks.”

5 Quick Steps to Backup Shared Mailbox in Office 365

  • Step 1. Download, Run & Click on the Login Button.
  • Step 2. Login with Office 365 Admin/User Details.
  • Step 3. Choose Shared Mailbox IDs to Export.
  • Step 4. Select Export Format & Mailbox Items.
  • Step 5. Set Date Filter & Click on Start Button.


A shared mailbox in Office 365 is a crucial feature offered by Microsoft, it allows admins to provide multiple user access to a particular mailbox. Furthermore, it helps improve collaboration, productivity, and efficiency for organizations of all sizes. Additionally, it also provides greater flexibility and control over email management and access. 

Some of the Benefits of Shared Mailbox

  • Collaborative email management
  • Centralized mailbox access
  • Reduced licensing and overall costs
  • Simplified email routing and forwarding
  • Enhanced security and compliance

Being a crucial part of the Office 365 suite, it becomes equally important to backup shared mailbox in Office 365 along with the other user mailboxes. Let’s discuss the different ways that can be used to perform this task efficiently. 

Approach #1 Using eDiscovery to Backup Shared Mailbox Office 365

eDiscovery or Electronic discovery is the process where you can identify and deliver electronically stored information. Further, it can be used as evidence in legal cases.

Furthermore, it allows users to search mailboxes in the eDiscovery search, and then export the same to their local system. Let’s have a brief discussion regarding the same.

Manual Way on – How to Backup Shared Mailbox in Office 365?

Step 1. Use your Office 365 admin credentials to log in. Navigate to Microsoft 365 Admin Center portal.


Step 2. Now, from the left pane, navigate to the bottom and click on Admin Centers. Then hit the Security and Compliance option.


Step 3. From the Security and Compliance drop-down, click on Permissions and navigate to eDiscovery Manager.


Step 4. Click on the checkbox beside eDiscovery Manager, and hit the Edit icon in order to add the necessary roles that are required for the Discovery Management group.


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

Step 6. In case, if the Export role is missing, then you can click on the Edit role group and add the same in order to backup shared mailbox Office 365.

Step 7. Then, again go back to the ‘Security and Compliance’ section. Find the More Resources section. Then, on the Microsoft Purview Compliance Portal click on Content Search >> the New Search option.

[Note: If you don’t find the ‘Content Search’ option, then check the eDiscovery permissions. You must have the permissions, so, set the required eDiscovery permissions prior to the process. Also, be informed that it usually takes up to 24hrs to for the changes made to the eDiscovery permissions to reflect.]

Step 8. The moment you click on New Search, you will see a new window. Here, you can find all the options to customize all elements of content search. For instance, you can specify the Name & description of the search, Location of the mailbox that you want to export.

[Note: You can enable the SharePoint and Exchange Public options under the Location section. It’s easy to do so however, the entire search process is going to take a little longer to complete.]


Step 9. Next comes the Conditions section. Here, it’s possible for you to apply different filters such as query language/ region, and keywords/phrases. By this, you can make the conditions more specific.

[Note: Though the Conditions section is optional, in case you don’t want to skip any data from the mailbox then avoid applying any filters.]

Step 10. Once you are satisfied & applied all the necessary filters in the settings then press the Submit button and then click on Done.

Step 11. After you tap on Done, the search process will start running in the background. And, for checking the status of the search, you can navigate to the Search tab and check the same.

Step 12. After that, check whether the search process is complete or not, and when you see the search result on the Search tab, click ‘Actions’ and then tap on Export Results.

Step 13. You can also export the encrypted files. For that, there are various options available. So, go to the Output Options, click on the radio button according to your need, and then click Export to backup shared mailbox Office 365.

[Note: If you want to avoid any confusion while carrying out the process then it’s recommended to don’t change the default settings. Moreover, if you want to export the search results as a single PST file then don’t on the Enable Depuplication option.]

Step 14. The export process will start immediately once you click on the Export button. To check the progress of the ongoing process navigate to the Export tab and check from there.

Step 15. Once the Export process finishes, you can save the results by clicking on the Download Results option. 


[Note: Make sure to click on the Copy to Clipboard button under the Export Key section to save the export key cause you are going to need the same in the next section.

Step 16. After that, once you click on the ‘Download Results option, the eDiscovery Export Tool will start automatically. Then, a window will pop up, here, you need to enter the Export key that you copied to the clipboard. After that click on Browse to define the destination path for saving the export result. At last, press the Start button to begin the process of exporting Office 365 mailbox items.


However, many Office 365 users are having a hard time dealing with so many issues in the eDiscovery Export tool. Let’s discuss some of the most common issues in the coming section.

Also Read: Learn How to Forward Multiple Emails from One Office 365 Account to Another

Common Errors Faced by Users While Using the Manual Method to Backup Shared Mailbox Office 365

Sometimes users get an error saying ‘can not download the application. The application is missing the required files. Try contacting the application vendor for more help.’ Well, it can happen, if you are using Internet Explorer 9.0 or an earlier version.

Plus, when users try to extract data from Office 365 mailboxes on the local system, many times they get error messages. Such as, ‘Office 365 eDiscovery Tool not working’ or ‘Office 365 eDiscovery search failed’.

So, what could be the root cause(s) for the eDiscovery export tool not responding?

eDiscovery Export Tool Issues and How to Fix it?

There are various reasons that can cease the eDiscovery export tool from responding.

  • Cause 1. If you are not using the latest version of Windows.
  • Fix – Use Windows 10 or a later version of the Operating System.
  • Cause 2. You are using Internet Explorer 9.0 or later and do not have the appropriate .NET version.
  • Fix – Install the Microsoft .NET  Framework 4.5 or later version.
  • Cause 3. Did not set up Local intranet zone settings correctly.
  • Fix – Make sure to add ‘https://*.outlook.com’ to the Local intranet zone in Internet Explorer. If it is not added then do the same by following the below steps.
  • Open Internet Explorer >> Tool >> Internet Option >> Security >> Local Intranet >> Site >> Advanced >> add ‘https://*.outlook.com’ >> Close.
  • Cause-4. You might be using a non-Microsoft(third-party) browser.
  • Fix – If using browsers like Google Chrome or Mozilla Firefox, install the ‘ClickOnce’ extension on the add-on web page.
  • Cause-5. Connections time out when using a proxy server
  • Fix – Try using the ‘netshcommand-line tool open port 8080 on the proxy server.

Now, you have the fixes to deal with the issues. However, don’t you think some of these are quite exhausting and very complex to attain?

So, let’s have a look at the below question. You too must be wondering the same question.

How to Backup Shared Mailbox in Office 365 – A Flexible Solution

Thankfully, yes! There is a quick solution to deal with issues while backing up shared mailbox in Office 365. Using the  Office 365 Export Tool eliminates all the errors and complexities. It is the one-stop solution, that ensures maximum data protection and integrity, throughout the entire process.  Most importantly, it is recommended by many IT experts and Office 365 admins.

Step By Step Quick Guide on – How to Backup Shared Mailbox in Office 365?

Refer to the below procedure to carry out the process of exporting Office 365 pst files to the local system.

Step 1. Download the tool and launch it on your system.

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Step 2. Click on the ‘Login’ button.


Step 3. Provide the login credentials. And mark the checkbox corresponding to ‘IsAdmin’. And click ‘Sign In’.


Step 4. Select the necessary user IDs to be exported and click on the ‘Next’ button to backup Shared mailbox in Office 365.


Step 5. Next, select the radio button against ‘Microsoft Outlook(pst) to choose the email format as PST

[Note: Tick the check box ‘Split Outlook Data Filter’ and enter the file size to be split]


Step 6. Then, select the categories such as emails, contacts, calendars


[Note: Apply the ‘Date Filter’ by clicking on the checkbox against it. And then click on the ‘Set’]


Step 7. After that, click on the ‘Browse’ button to select the destination folder path.

Step 8. Finally, click on the ‘Start’ button to backup shared mailbox in Office 365.


Step 9. The export process will then start.


Step 10. Finally, click on the ‘Save Report’.

Extra Benefits You Can Get by Using the Software 

Features that make it a prime choice for users, when it comes to backing up shared mailboxes in Office 365.

  • You can backup shared mailbox into multiple file formats.
  • Not just one, you can export multiple mailboxes at once.
  • It preserves all the mail attachments and attributes in their original state.
  • You can pause and resume the process at any point in time.
  • After validating the Office 365 account, it can automatically fetch all the existing mailboxes.

And, many more!

Bringing It All Together

In this write-up, we have discussed one of the most commonly asked queries – “How to Backup Shared Mailbox in Office 365?” You can choose any of the above approaches to perform this task. However, the manual method can be overwhelming and error-prone. Moreover, it should be implemented under technical supervision, or it could result in crucial data loss scenarios.  

Whereas, the automated software discussed above is the best alternative to manual methods and is recommended by various IT experts, throughout the globe.