Complete Guide to Importing PST Files into Exchange Server in 2026

Reasons to Import PST File to Exchange Server

• If mailbox information was previously exported to PST, users can use the PST as a source for restoring the data.
• Employees may have years of email stored locally in PST files. Importing those files into Exchange makes the information available from the user’s mailbox.
• It helps to keep business emails on individual computers can make backup, security, and administration harder.
• Older messages can be imported into a user’s primary mailbox or archive mailbox, which depends on the organization’s requirements.

Pre-Steps Before Importing PST to Exchange Server Mailboxes

PST files need to be imported through PowerShell or EAC with the user having permissions for the Mailbox Import Export role. The following command will help you assign permissions for the same from EMS:

New-ManagementRoleAssignment -Role “Mailbox Import Export” -User Administrator

• Creation of a PST file is required: If the Outlook data of the user is still within Outlook and hasn’t been saved in a PST format.
• Use of PST file already available: In case the user has an existing PST file stored on their system, that particular PST file can be used for Exchange mailbox import.

Import PST to Exchange Server Using Exchange Admin Center

1. Sign in to the Exchange Admin Center for your on-premises Exchange organization.
2. Click on Recipients > Mailboxes. Select More options and choose Import PST.
3. Enter the UNC path of the PST file. For example: \\SERVER01\PSTFiles\John.pst
4. Choose the mailbox where you want the PST data to be imported.
5. You can normally choose between importing the data into the user’s Primary mailbox or Archive mailbox.
6. You can choose whether Exchange should send a notification after the import request is processed.
7. Review the settings and complete the PST to Exchange Server export.

Migrate Outlook to Exchange Server Using PowerShell

You can use Exchange Management Shell to import PST files directly into Exchange Server mailboxes. The New-MailboxImportRequest cmdlet lets you select the PST file, target mailbox, and destination folder.

New-MailboxImportRequest -Mailbox mack -FilePath \\RP-GH03\PST\mack.pst

To import only the Inbox into a specific folder, use:

New-MailboxImportRequest -Mailbox mack -FilePath \\RP-GH03\PST\mack.pst -TargetRootFolder “Old_mail” -IncludeFolders “#Inbox#”

To check the import status, run:

Get-MailboxImportRequest | Get-MailboxImportRequestStatistics

Limitations: Manually Import PST Mailboxes to Exchange Server

• It requires technical knowledge of Exchange and PowerShell.
• Large PST files may take considerable time to process.
• Failed or incomplete imports need to be checked separately.
• Damaged PST files may cause errors during the import.
• Data should be verified after the import to make sure important emails and folders are available.

Professional Tool to Import PST to Exchange Server

In case of several PST files, the best software to use is the trusted SysInfo PST to Microsoft 365 Backup Tool, which is utilized for importing bulk PST files without losing any data. It helps to import PST file to Shared Mailbox, Primary Mailbox, or Online Archive. There is no need to use any command or Outlook to perform this process. Maintains the folder hierarchy, structure, and metadata during the entire process.

Key Features of Using a Professional Tool

• Support batch migration with 100% accurate results.
• Preview option to cross-verify the added PST files.
• Remove Duplicates based on To, From, Subject, Body, or CC.
• Date Filter for selective email migration within a date range.
• Exclude attachments and define a custom folder name.
• Option to import PST to Google Workspace and other email clients.
• Highly compatible with all MS Outlook and Windows versions.

Steps to Import Local Outlook .pst Files into the Exchange Server

Steps	Description
Add PST Files	Download the software. Choose PST files and click Next.
Preview & Saving Format	Preview the added PST file and choose Office 365 as the Saving Format from the list.
Apply Features & Start	Apply the advanced features and click Start the process.

Note: For detailed steps, check the software guide of SysInfo PST to Office 365 Migration Tool.

Real-Life Scenario

A company had several employees with old Outlook PST files containing years of emails and attachments. The IT team wanted to move this data into Exchange Server so employees could access their old messages from their mailboxes. Having tested out the manual import process, it became clear that a migration tool should be used for migrating several PST files. In case you are migrating your PST data to Microsoft 365, the provided guide will help you to import PST to Office 365.

Conclusion

This guide explains all the necessary information about how to import PST to Exchange Server. The manual methods use Exchange Admin Center & PowerShell to perform the process. However, they have several limitations. Therefore, it’s good to use a professional tool. It imports multiple PST files at once.

Frequently Asked Questions: