-
Written By
Suman Rawat -
Approved By
Sonika Rawat -
Updated on
July 28th, 2025 -
Read Time
7 minutes
Summary: Managing PST files beyond Exchange Online can be time-consuming and expose your modern businesses to security vulnerabilities. With the rise of Microsoft 365 organizations, the need for PST files to be migrated to Exchange Online is necessary for compliance and productivity purposes. This blog examines secure and efficient methods to import PST file to Exchange Online for free or using a PST to Office 365 Migration Tool
There are multiple scenarios requiring PST files to migrate into inboxes, including:
Furthermore, as compared to email exports, migrating a PST file to Exchange Online requires the consideration of:
When these factors are combined with the need for bulk import jobs or automated workflows using hybrid environments. The migration of a PST to a single user to an enterprise level becomes a challenge in a matter of days. But don’t worry, we have got you covered with simple and easy solutions, explained in the following section.
Users can opt for a free solution or an automated method to perform the migration, whichever suits them best. While the manual process is free, it has some prerequisites and limitations. On the other hand, the tool is a trusted and verified solution by the experts that saves time and effort.
This migration can be done using the Microsoft Network Upload method by the Security and Compliance Portal. The process is secure and cloud-native, but ensure you first complete these pre-requirements:
Now, the complete process to import PST file to Exchange Online is divided as follows:
First, use Microsoft Outlook or eDiscovery (Compliance Center) to export the contents of your mailbox to .pst files.
AzCopy.exe /Source (PST FOLDER):”C:\PSTs” /Dest:”<your_SAS_URL>” /V:”C:\Logs\Upload.log” /SUBFOLDER |
Note: Make sure the PST filenames are unique to each mailbox, and that there are no special characters.
Workload, Path of File, Name, Exchange Online Mail, IsArchive, TargetFolder |
In IsArchive: Put True if the file is archived, else False.
Limitations of the Manual Method
For a large dataset, role-based constraints, and to bulk automate import PST to Shared Mailbox in Exchange Online, a professional tool is best.
Using a dedicated migration tool can dramatically enhance outcomes for IT administrators who are facing large volumes or time-sensitive projects. A reliable option is SysInfo PST to Office 365 Migration Tool, a dependable utility that enables direct mailbox mapping within PST files. Furthermore, it works with archive mailboxes, shared mailboxes, and user mailboxes. Moreover, it does not require Outlook, and it works quickly in Windows and Mac OS.
Client Success Story:
When a legal services firm was required to consolidate approximately 6,000 PST files located in 14 offices to Exchange Online. They relied on manual uploading. It took weeks, and very large PSTs had no chance of succeeding. Eventually, they switched to our PST to Exchange Online Migrator. It completed the migration in just a couple of hours, preserved folder hierarchy and metadata integrity, and realized zero data loss. Also, it enabled audit-compliant logs to support their internal documentation.
The CTO of Legal Operations Firm stated,
“We went from near chaos to full compliance in less time, without disrupting workflow and with precision.”
Quick Guide to Migrate PST to Exchange Online
Isn’t this a lot simpler, straightforward, quick, secure, and efficient? Still, if you face any issues, contact our expert team; they are available 24*7. Or, first, try out the demo version for yourself.
To sum up, importing PST files into Exchange isn’t simply a task of migration. It is a strategic step for centralizing, securing, and complying with email management. While it is plausible to import PST file to Exchange Online using manual methods, the feasibility is limited for enterprise-level operations. An automated solution provides reliability, scalability, and audit-ready results for organizations with multiple or custom requirements.
Ans- Microsoft doesn’t limit the PST file size for import, but the mailbox quota limits are applied. Whereas, the PST to Office 365 Migrator doesn’t have any specific file size or mailbox size limit when you import PST in Exchange Online. It supports batch migrations from several accounts altogether with 100% accurate outputs.
Ans- Yes, of course, you can. The PST Import Tool enables you to save data in Online Archive, Primary, and Shared mailboxes as per your choice. You can choose and map the mailbox before the final migration.
About The Author:
Suman Rawat is a technical content writer and expert in the fields of email migration, data recovery, and email backup. Her passion for helping people has led her to resolve many user queries related to data conversion and cloud backup.
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