Import PST to Online Archive Office 365 for Large PST Files

We have 350 Office 365 users, each with 2–5 PST files (20–80 GB) to import into Online Archive. Outlook becomes almost unusable during manual imports, and we’re also trying to eliminate PSTs because of OneDrive sync issues. What’s the best way to import PST to Online Archive Office 365? 

~ James Wilson, UK

The importation of PST files into Office 365 Online Archive assists organizations in handling storage limitations effectively and complying with data requirements. Most individuals will try to move Outlook archive to Online Archive through either Outlook or the Office 365 Import Service; however, these techniques may require some level of technicality and time considerations. The SysInfo Office 365 Backup Tool is an effective way to move PST files to the Online Archive without losing any information.

Before moving to the advanced utility method, we will cover some manual solutions for the “End Users” and the “IT admins” below.

Conventional Approaches for End-Users

There are multiple ways to import PST to Online Archive Office 365. In this section, we will cover the import/export Wizard, the copy folder method, and the drag and drop of content from PST. The method we will cover in this section works better for small migrations. Also, it is time-consuming while handling the large PST files.

Upload PST to Online Archive Using Import/Export Wizard 

  1. Open the Classic Outlook desktop application.
  2. Go to File > Open & Export > Import/Export.
  3. Select Import from another program or file, then click Next.
  4. Choose Outlook Data File (.pst) and click Next.
  5. Browse and select the PST file you want to import.
  6. Choose how duplicate items should be handled and click Next.
  7. Select Import items into the same folder.
  8. Choose your Online Archive mailbox from the drop-down list.
  9. Click Finish to begin the import.

Ⓘ This method is best suited for small PST files and one-time imports.

Copy an Entire Folder from a PST File to the Online Archive

  1. Select the folder you want to copy to the archive mailbox.
  2. Right-click the folder and choose Copy Folder.
  3. If you want to copy the folder to the root of your Online Archive mailbox, select the Online Archive mailbox as the destination 
  4. Click OK to start the copy process.

Ⓘ Your Outlook can be unresponsive during the implementation because of the content and the size of the folder.

Drag and Drop or Move Selected Emails to the Online Archive

  1. Open the PST folder and click any email in the folder.
  2. Press Ctrl + A to select all messages.
  3. Right-click the selected emails and choose Move > Other Folder.
  4. Select the appropriate folder within the Online Archive mailbox.
  5. Click OK to move the selected items.

Ⓘ This is time-consuming and impractical for large PST files.

Note: All the methods above are DIY approaches for small or moderate migrations. To move PST file to Online Archives in bulk, there are two options: Network Upload and SysInfo Office 365 Backup Tool. Let’s move towards the execution of both approaches.

Import PST to Online Archive Office 365 via Network Upload

This method allows “IT admins” to handle the bulk migration securely using AzCopy and the Microsoft Purview portal. 

Steps to Export Outlook PST to Online Archive

  1. Sign in to the Microsoft Purview portal with an administrator account.
  2. Create a New Import Job and select Upload your data.
  3. Download AzCopy and copy the provided SAS URL.
  4. Use AzCopy to upload your PST files to Microsoft Azure Storage.
  5. Create and upload a CSV mapping file to map each PST to its Online Archive mailbox.
  6. Review the settings and start the import job.
  7. Monitor the import until the status shows Completed.

Limitation: This method is for IT admins and requires technical configuration, including AzCopy and CSV mapping.

IT-Grade Solution to Import PST to Online Archive Office 365

The SysInfo Office 365 Backup Software provides an easy solution to import PST files to Office 365 Online Archive mailboxes. The tool enables importing the PST content without the installation of the Microsoft Outlook application on the system. The tool is capable of importing PST content in Primary, Shared, and In-Place Archive mailboxes. Folder structure and integrity will be maintained during the entire migration process.

Steps to Move Outlook Archive to Online Archive

  1. Download the tool and choose to Restore.
    Download the tool and choose to Restore
  2. Then, browse & select the PST file/folder and click Next.
    browse & select the PST file/folder and click Next
  3. Thereafter, review the selected file or folder and click Next.
    review the selected file or folder and click Next
  4. Now, choose Office 365 from the drop-down and log in with your credentials.
    choose Office 365 from the drop-down and log in with your credentials
  5. Afterwards, use the filters and click the Next button.
    use the filters and click the Next button
  6. After that, map users and press the Next button.
    map users and press the Next button
  7. Finally, verify the source & destination and click Restore.
    verify the source & destination and click Restore

Why Choose SysInfo Office 365 Email Backup Tool?

  • Backs up complete mailbox data such as emails, contacts, and calendars.
  • Supports Primary, Shared, and In-Place Archive mailboxes with ease.
  • Backup Office 365 mailbox to PST, PDF, MBOX, EML, and CSV formats.
  • Maintains the original folder structure and keeps data fully intact.
  • Allows direct migration to Gmail, G Suite, and IMAP platforms.
  • Provides a preview option so users can select folders first.
  • Works without any file size limit, even for large mailboxes.
  • Offers date range filters to perform selective and targeted backups.
  • Remains compatible with every Windows operating system version available.
  • Uses modern authentication methods that keep account login fully secure.

Conclusion

For backing up Office 365 mailbox data, it is necessary to choose a reliable technique to protect emails, contacts, and calendar items from unexpected deletion or loss. In case of manual backup, there may be some problems associated with the large size of mailboxes or dealing with several users. The SysInfo Office 365 Email Backup Tool comes as a perfect solution that saves the hierarchy of folders, allows batch processing, and permits migration to another software platform directly. Companies willing to ensure easy mailbox backup and management can use this convenient tool to import PST to Online Archive Office 365 without errors.

Frequently Asked Questions

Q1: How can I import large PST files to an Office 365 Online Archive mailbox?

Ans: You can use the Microsoft Purview Network Upload method or the SysInfo Office 365 Email Backup Tool. For large-scale migrations, the SysInfo tool provides a simpler way to import multiple PST files while preserving the folder hierarchy and data integrity.

Q2: Can I import password-protected PST files into Online Archive?

Ans: Yes. If you know the password, you can unlock the PST file before importing it. The SysInfo Office 365 Backup Software also supports importing password-protected PST files by prompting for the password during the process.

Q3: Is there a file size limit when importing PST to Online Archive Office 365?

Ans: Outlook-based manual methods may become slow with large PST files. However, the SysInfo Office 365 Email Backup Software supports importing large PST files without file size limitations, making it suitable for enterprise migrations.

Q4: Can I import PST files directly to the Online Archive instead of the primary mailbox?

Ans: Yes. Both the Microsoft Purview Network Upload method and the SysInfo Office 365 Migrator allow you to import PST files directly into an Online Archive mailbox instead of the primary mailbox.

Q5: Can I migrate PST files from a network drive to Online Archive Office 365?

Ans: Yes. As long as the PST files are accessible, you can migrate them to Office 365 Online Archive. The SysInfo Office 365 Migration Tool lets you browse and import PST files from local locations.

Q6: Is it possible to map PST folders to specific folders in the Online Archive?

Ans: Yes. During the migration process, you can map PST data to the required Online Archive mailbox. The SysInfo Office 365 Migration Software also provides user mapping and maintains the original folder structure throughout the import process.

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About The Author:

Simran Bhatia is a technical content writer engaged in writing clear, concise, and SEO-optimized content. With a background in computer science and a passion for writing, I thrive to deliver complex technical content in simple layman terms.

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