How to Import PST into Office 365 without Duplicates?

Summary: Importing PST files with duplicate emails and other items into Office 365 may increase the size of the Office 365 mailbox and make it difficult to manage the mail items. This blog discusses the methods to import PST into Office 365 without duplicates. Also, it mentions a specialized PST to Office 365 migration tool to directly import PST files into Office 365 without duplicates.

Microsoft Office 365 is a robust cloud-based service for managing emails and other tasks. It allows users to access their emails anytime and from anywhere, if they have access to the internet. Also, it contains various enhanced features that compel the users to shift from desktop-based or on-premises platforms to Office 365. As Office 365 supports the PST format, users need to import their email account data into Office 365 in this format. Importing PST with duplicate items may consume unnecessary space and make the import process time-consuming. In this blog, we have mentioned different methods to import PST into Office 365 without duplicates.

Methods to Import PST File into Office 365 without Duplicates

There are various methods to import PST file into Office 365 without duplicates. Here are some of them:

1. Use Outlook Import/Export Wizard

You can import the PST file into Office 365 mailbox via Outlook Import Export wizard. It provides an option to exclude the duplicate items in the .pst file while importing. Here are the steps to import PST file into Office 365 without duplicates by using Outlook:

Note: This method is feasible if you have to import a few PST files into Office 365 as you can only import one PST at a time.

2. Network Upload

In the Network Upload method, you have to download the AzCopy tool to upload the PST files to a temporary Azure storage location on the cloud. Then, use the Microsoft 365 import service to import the PST files into the target users’ mailboxes. You have to also create a PST mapping file in CSV format. You can use the filter data option to filter the duplicated item from the PST files while importing. For detailed steps, read How to Use Network Upload to Import PST into Office 365.

You can use this method to import multiple PST files into Office 365 at once. However, it is a lengthy process and has some limitations, such as:

3. Drive Shipping Method

Instead of uploading the PST files to Azure storage, you can copy the PST files to a BitLocker-encrypted hard drive and then physically ship that drive to Microsoft Data Center. After receiving the hard drive, Microsoft team uploads the PST files to a storage area on Microsoft Cloud. After this, you can use the Office 365 import service to import the PST file into users’ mailboxes. You can get the option to filter the PST files data before importing.

Although this method helps you import the PST files from Office 365 without duplicates, it has a few limitations, such as:

4. Use Outlook PST to Office 365 Migration Tool

For quick and hassle-free process, you can use a specialized PST to Office 365 migration tool. Stellar Migrator for Outlook is an effective tool to import PST files into Office 365 without duplicates. It merges the identical folders in the Office 365 mailbox to prevent duplicate mail folders. You don’t have to assign any mailbox role, upload a PST mapping file, and ship the hard drive to Microsoft. It allows you to import a PST file up to 50 GB or more with complete integrity. Follow the below steps to import Outlook PST into Office 365 using this tool:

Conclusion

The duplicate emails can lead to confusion, increase the size of the Office 365 mailbox, and take up more cloud storage. This blog discusses the methods to import the PST file into Office 365 without duplicates. You can use any of the methods mentioned in this post to import PST into Office 365. There are multiple challenges and limitations associated with the manual methods. If you are looking for a time-saving solution while ensuring no duplicates are imported, try Outlook PST to Office 365 migration tool. It can directly import PST files into Office 365 mailboxes without duplicates.

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