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How to Import PST to Outlook 365; The Ultimate Guide to Follow

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Published By Mohit Jha
Anuraag Singh
Approved By Anuraag Singh
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Published On September 21st, 2023

Importing PST files to Outlook 365 web can seem like a daunting task, but it doesn’t have to be. With the right tools and a little bit of knowledge, you can easily import your PST files and start using them in Outlook 365 web.

In this guide, we will walk you through the process of importing PST files to Outlook 365 web, from preparing your files to importing them. We will also cover some tips and best practices to make the process as smooth and efficient as possible. By the end of this guide, you will have a solid understanding of how to import PST files to Outlook 365 web using Export & Import Wizard, Network Upload, and a Reliable tool. But first, let’s learn the quick steps:

5 Quick Steps to Import PST to Outlook 365

  • Step 1. Download & Run the Application on PC. 
  • Step 2. Set Outlook & Office 365 as Source & Destination.
  • Step 3. Choose Needed Workload & Apply Date Filter.
  • Step 4. Authenticate Source & Destination credentials.
  • Step 5. Select Users & Click on Start Import Button.

Network Upload Methos to Import PST to Outlook 365 Web – All Steps Explained

When it comes to importing PST to Outlook 365 online, there are three different ways available for the users. One way is to use the Azcopy tool to Import PST to Outlook 365 web, but this method has its own limitations. Let’s discuss each step in detail:  

Step 1. Copy the SAS URL then Download AzCopy Tool.

  • Open your browser and navigate to https://compliance.microsoft.com. Use your admin credentials to sign in to the portal. 
  • Navigate to the left pane of the screen click on Data Lifecycle Management and select Microsoft 365 from the dropdown. Then a new screen will open, here you need to click on Import.

Note: If the Import option is missing, then you need to assign the required permissions in the Exchange online role group.  

  • From the Import tab, click on the Add button to add a New import job.
  • Now an Import Data wizard will open with multiple tabs such as Name your Job, Select Import Job Type, Import Data, Select Mapping File, and Review
  • Provide all the required details in these tabs and select the Upload your Data option on Do you want to upload or ship data? screen and then click on the Next button.
  • It will create a Network Upload Import Job. Now follow the below-mentioned steps on the Import Data page:
    • Firstly click on the Show network upload SAS URL option. Copy the SAS URL displayed on the page. Save it carefully it will be used later to import PST files to Outlook 365.
    • Then click on the Download Azure AzCopy button to download the AzCopy tool on your computer. It is an executable file, there is no need to install it on your system.

Step 2. Upload Respective PST Files to Outlook 365.

Once you have downloaded the AzCopy tool on your computer, it is ready to use. It uploads the PST files and stores them in a Microsoft-provided Azure Storage location in the Microsoft cloud.

Note: Be careful and ensure that each PST file that needs to be imported to Outlook 365,  should not be larger than 20 GB. As it can impact the PST import process and you can get errors or face failure while executing the same. Additionally, the names of each PST file should be unique.   

  • Run cmd on your local computer.
  • Navigate to the directory where the azcopy.exe file has been downloaded.
  • Run the below-mentioned command to Import the PST files to Microsoft Outlook 365.

PowerShell Command :- azcopy.exe copy “<Source location of PST files>” “<SAS URL>”

For example – 

 azcopy.exe copy “E:\PST\abc” “https://dbc91ac2cdda49d127553da.blob.core.windows.net/ingestiondata?sv=2015-04-05&sr=c&si=IngestionSasForAzCopy201203925129282846&sig=uT%2BHy1%2FHUFL6L3aw4476QxfZqMbeQdOGetYKguQwF44%3D&se=2020-11-20T05%3A18%3A22Z”

Step 3. Verify Imported PST Files to Microsoft Azure Storage. (Optional)

This is an optional step, here you can download the  Microsoft Azure Storage Explorer – (It is a free & open-source tool) in order to view and verify the respective PST files that you have imported to Azure blob.

Although this is an optional step, it becomes helpful when you create the mapping files for PSTs in the very next step. As there you have to specify both the folder pathname and filename for each PST file, you want to import to Outlook 365. Performing this optional step reduces the potential errors in PST mapping file creation.

  • Download install and run the Microsoft Azure Storage Explorer tool on your local computer.
  • Navigate to the Select Resource page from the Connect to Azure Storage dialog and then select Blob Container.
  • Now from the Select Authentication Method screen, opt for the Shared Access Signature (SAS) option, then click on the Next button.
  • Here paste the copied SAS URL on the Enter Connection Info screen and click on the Next button. When you will paste the SAS URL it will automatically auto-populate the Display Name with ingestiondata then click on Connect.
  • It will open the Ingestiondata Container, here you can find all the PST files that you have uploaded in Step 2. It is located under Storage Accounts > (Attached Containers) > Blob Containers.

Step 4. Now Create a CSV Mapping File to Import PST Files

Once, you have imported all the required local PST files to the Azure Storage location in your organization, now you have to create a CSV file specifying the destination user mailboxes, PST file path, name, etc. in order to import them safely to Outlook 365. 

  •  You need to download a copy of the PST Import mapping CSV file on your computer.
  • Now open it using either NotePad or Microsoft Excel to edit and provide the required details as shown in the example below.

The Arrangement Order of Required Info:-  

Workload,FilePath,Name,Mailbox,IsArchive,TargetRootFolder,ContentCodePage,SPFileContainer,SPManifestContainer,SPSiteUrl

Examples:-

  • Exchange,,abc.pst,abc@xyz.onmicrosoft.com,FALSE,/,,,,
  • Exchange,,efg.pst,efg@xyz.onmicrosoft.com,TRUE,,,,,
  • Exchange,,jkl.pst,jkl@xyz.onmicrosoft.com,FALSE,/,,,,
  • Exchange,,mnp_archive.pst,mnp@xyz.onmicrosoft.com,TRUE,,,,,

Note: While creating the CSV mapping file, you should keep in the mind the limitation i.e. you can only have a maximum of 500 rows in the CSV mapping file, if you need to add more rows then you must need to create multiple CSV mapping files and multiple import jobs in coming Step 5.

Step 5. Create a PST Import Job Accordingly 

  • Navigate to https://compliance.microsoft.com and use the same admin credentials to sign in as used in Step 1.
  • Navigate to the left pane of the screen click on Data Lifecycle Management and select Microsoft 365 from the dropdown. Then a new screen will open, here you need to click on Import.
  • From the Import tab, click on the Add button to add a New import job.
  • Now an Import Data wizard will open with multiple tabs such as Name your Job, Select Import Job Type, Import Data, Select Mapping File, and Review
  • Provide all the required details in these tabs and select the Upload your Data option on Do you want to upload or ship data? screen and then click on the Next button.
  • Now, check both options given here – I’m done uploading my files and I have access to the mapping file then click on the Next Button. 
  • From Select the mapping file screen, and click on it to submit the previously created CSV file in Step 4.
  • Once, the file is attached click on the validate button to validate the submitted CSV file just to ensure there is no error in the arrangement of data.
  • Once the validation is completed successfully then you can see the file name in green color. After that check the terms and conditions document and click on the submit button to save the job. Here the job is successfully created.
  • You will see a status flyout page, where you can analyze the progress and see the new import job in the list of Import PST files pages.
  • You can also click on the Refresh button to see the latest status info displayed in the Status column. Once, the status gets changed to Analysis Complete then you are ready to Import your PST files to Outlook 365.

Step 6. Apply Filters for Selective Import and start the PST Import Job

Once you create the PST import job in Step 5, Microsoft 365 examines the data in the PST files (in a safe and secure way) by determining the age of the items and the different message types included in the PST files. 

Once the analysis is completed, you have two options whether you want to import the entire data into Outlook 365 or you can trim it down based on your preferences.  In order to do so, you can set filters that help you control what PST data gets imported to Outlook 365.

  • Now from the Import tab in the Compliance Portal, click on the import jobs that you have created in Step 5. Click on Import to Microsoft 365.
  • You can do the following:
    • If you want to trim the data that you want to import, click Yes, I want to filter it before importing.
    • In order to trim the data you can configure different filters based on age, type, and users.   

Or

    • If you want to import the entire data, then click on the No,  I want to import everything button, and then click on the Next button. 
  • You will see the status of the Import Job, where you can analyze the progress and see the new import job in the list of Import PST files pages.
  • You can also click on the Refresh button to see the latest status info displayed in the Status column. 

Importing PST File Into Outlook Web App, Manually Using Import/Export

If you choose to implement the manual method for importing PST to Outlook 365 web, you need to have a desktop MS Outlook on your system. Then you have to configure the Office 365 account in it.

Now we will see how to configure your Office 365 account with Outlook 2016:

Step 1. Launch MS Outlook 2016 on the system and click on File>> Add Account. import pst to Outlook web

Step 2. Enter our Office 365 email address and click Continue

Step 3. Add the password when prompted and click on OK>> Finish.

Step 4. Office 365 will be configured in your Outlook. Now, you can migrate the PST file in Outlook and it will get imported into Outlook 365 online as well.

Now it is time to transfer your PST file in Outlook:–

Step 1. Click on the File tab in Outlook 2016 and choose Open & Export>> Import/Export.

Step 2. From the Import Export Wizard, select Import from another program or file>> Outlook Data File (.pst) on two consecutive pages.

Step 3. Click on the Browse button to select the PST file from its location. Choose the preferred option and click Next.

Step 4. If you want to import the complete file, select the root file and check the Include subfolders option. Now choose Import items into the same folder in the option and then add your Office 365 account ID here.

Step 5. Click Finish to get done with the data transfer. Check Outlook Office 365 and you will see the items in the PST file have been migrated to that mailbox.

Limitations of Manual Method to Import PST to Office 365 Account

As you can see, this method includes the configuration of Office 365 in desktop-based Outlook. This makes the import PST to Outlook web quite lengthy and complex. Moreover, people without MS Outlook on the system may not be willing to install it just for the sake of this process. For all these reasons, people choose the mentioned software for the easier and simpler import process.

There are several limitations to using the Network Upload method to import PST files to Office 365.

Some of these include:

  • Time-consuming – The manual method can take a significant amount of time, especially if you have a large number of PST files to import.
  • Error-prone – The manual method is prone to errors, such as accidentally importing the wrong PST files or importing files to the wrong location.
  • Limited scalability – The manual method is not suitable for large-scale migrations, as it can be very difficult to manage and organize the large number of PST files that need to be imported.
  • Lack of automation – The manual method does not offer any automation, which can make the process more tedious and time-consuming.
  • Limited features – The manual method does not offer any advanced features such as filtering, deduplication, and mapping of folders.

Overall, the manual method is only suitable for small-scale migrations and not recommended for large-scale migrations.

“Hello! I have got more than 5 PST files that I need to import in Outlook web app. I have checked the manual method but that requires importing one PST file at a time. Is there any technique with which, I can easily import all the PST files at one go. If anyone knows, please inform me here.”

Directly Import Multiple PSTs to Outlook 365 Using the Reliable Solution 

If you want to import PST to Outlook 365 in bulk, then use the Office 365 PST Import Tool. With this, you do not have to go through the process of configuring an Outlook 365 account in MS Outlook again and again.

Download Now Purchase Now

They can simply add one or more PST files from their system or the domain network in the tool. Then it is the full responsibility of the tool to perform the migration. It does not require constant supervision of the user.

The application also allows incremental migration of the same PST file for a second time. It also offers selective PST file item transfer based on category and date filters. The program not only retains the complete email metadata but also excludes unnecessary folders like Sent Items and Deleted Items. All in all, this utility is the perfect solution for users who want problem-free PST file import in Outlook Web Access.

Step By Step Software Working to Import PST Files to Office 365 Mailbox

Step 1. Opt for Outlook as your source platform and Office 365 as your destination platform.

Step 2. On the same interface, pick the categories you want to import from PST files into Office 365 within the Workload Selection.

Step 3. Utilize the Date-Range Filter feature to selectively import mailbox data according to specific dates. Then, proceed by clicking Next.

Step 4. You will now be directed to the Source screen. Here, designate the folder path where you’ve stored the Outlook PST files.

Arrange PST files within folders named after the respective O365 email IDs in the following manner:

Establish a folder in the root drive, for instance, 

  • E:/PST/user1@domainName.com/ (place all user1’s PST files here)
  • E:/PST/user2@domainName.com/ (place all user2’s PST files here)
  • E:/PST/user3@domainName.com/ (place all user3’s PST files here)

And so forth…

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

Step 5. Click on Validate to confirm that the necessary permissions have been granted to the files. After validation, permissions will be extended to the source platform. Click Next.

Step 6. Enter the Office 365 admin email account and application ID for the destination. Click Validate to verify the credentials. After validation, permissions will be granted to the admin account. Click Next.

Step 7. On the Users screen, you have several options for adding users from the source account that require processing:

  • Fetch Users – Automatically retrieves users from the Source.
  • Import Users – Imports users via CSV.
  • Download Template – Downloads a template for creating a CSV file.

Select the desired option to add users from the source.

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

Step 9. Now, users need to include destination user accounts. You have two alternatives to this:

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

Template Download

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

Users Validated

Step 11. Users can set priorities for the import task. Choose accounts based on priority, as illustrated in the image.

Priority Import
Step 12. Finally, click the Start Import button to import PST files to Microsoft Office 365.

Also Read: How to Import PST to Shared Mailbox Office 365 using PowerShell?

Final Words

Many Office 365 webmail users face the same problem when they have to import PST to Outlook 365 web. Since the manual method requires Outlook configuration, most users will find this technique lengthy and complex. For them, we have described a simple method that will allow users to directly import PST files to Outlook 365 web app. Users can pick any of these approaches as per their preferences.

User Testimonials 

Check out some of the users’ reviews for this tool.

  1. “It has been a lifesaver for our company’s migration to Office 365. The tool made the process seamless and efficient, saving us a significant amount of time and effort. The user-friendly interface and advanced features made it easy to organize and import our PST files. I highly recommend this tool to anyone looking to import PST to Office 365.”

  2. “We were hesitant to use a third-party tool for our PST migration, but this tool exceeded our expectations. It allowed us to import our PST files quickly and easily, without any errors. The deduplication feature was a game-changer and saved us a lot of time. We are extremely satisfied with the results and would recommend this tool to anyone.”

  3. “As a small business, we didn’t have the resources to hire a consultant for our PST migration. But this tool made the process simple and affordable for us. The tool’s automation features saved us a lot of time and the support team was very helpful in answering any questions we had. We highly recommend this tool for anyone looking for a cost-effective solution for PST migration to Office 365.”

  4. “Our company had over 50,000 PST files to import to Office 365. We were worried about the time and effort it would take to manually import them, but this software made the process a breeze. The tool’s filtering and mapping features were incredibly helpful in organizing the files. We were able to complete the migration in a fraction of the time we expected. We highly recommend this tool to anyone facing a large-scale migration.”

Frequently Asked Questions Regarding Import PST to Outlook 365

Q1. How Can I import a PST file into Outlook 365?

There are generally two ways that you can use to import PST files to Outlook 365: Network upload and Import / Export Wizard. However, both have their own set of limitations. Hence, using the above tool can help you complete the task without any limitations or data loss.

Q2. Where is the PST File located in Outlook 365?

In order to see the storage location of Outlook PST files, you can follow the below steps:

  • Step 1. From the main interface of Outlook for desktop, click on the File.
  • Step 2. Navigate to Account Settings and click on Data Files.
  • Step 3. Here you can see the destination path for saved Outlook PST files under the Location. 

Q3. How long does it take to Import PST to Office 365 webmail?

No matter whether you use Network Upload, or Drive Shipping, manually importing PST files to Outlook 365 can be a time-consuming process. Moreover, you can face various limitations and errors while executing the same. Hence, using an automated solution is always a reliable option to go for. 

Q4. Is there any limitation to using the Network upload method?

Yes, there are various shortcomings associated with Network Upload, you should be technically sound, you must have access to the Exchange admin center, and you must have permission to create Import jobs, etc. In addition to this, while creating the CSV mapping file, you can only have a maximum of 500 rows in the CSV mapping file, if you need to add more rows then you must need to create multiple CSV mapping files and multiple import jobs in the coming Step 5.