Import PST File to Primary Mailbox in Outlook: A Complete Guide

What Primary Mailbox Means in Outlook

A primary mailbox in Outlook is an account where you will send and receive emails. All your sent and received emails, along with any attachments or items within the mailbox, are stored here. This mailbox is commonly used for:

• Daily email communication.
• Sending and receiving business emails.
• Managing personal or work-related messages.
• Accessing emails and folders in one place.

A primary mailbox helps users manage their regular email communication from their main Outlook account and understand how to import PST file into Outlook primary mailbox.

Before You Start

There are several reasons why you may want to add PST files to your main mailbox. Whether it’s because you’re changing PC, recovering from a backup, or simply moving mail from local folders to an IMAP or Exchange account, go through the following points.

• Classic Outlook for Windows installed, with the destination account signed in.
• The PST file copied to a local folder, with a spare copy stored elsewhere.
• The PST password, if one was set.
• Enough free storage in the destination mailbox.

One caveat on versions. Microsoft’s guidance separates classic Outlook from the new Outlook, and it warns that calendar and contacts saved in .pst files aren’t accessible in the newer version.

Manual Method: Import PST File to Primary Mailbox with the Import/Export Wizard

Outlook’s wizard needs no extra software, which makes it a sensible first try for a single file.

1. In Outlook, Navigate to File > Open & Export > Import/Export
2. Select Import from another programme or file and click Next.
3. Select Outlook Data File (.pst) and select Next.
4. Browse to your PST file, select an option under Options to either Replace duplicate items, Allow duplicate items, or Don’t import duplicates. Click Next.
5. If you’re asked for a password, enter it. Select the top-level folder to import everything, and check the Include subfolders box.
6. Select Import items into same folder. Choose your main mailbox from the list.
7. Click Finish. The import will start, and once the progress box has closed, the import will be complete.

Manual Method Limitations

• One PST file at a time. A folder of twenty archives means twenty trips through the same screens.
• Duplicates are governed only by three options: replace, allow, or skip.
• You see folder names rather than message contents before you commit.
• A working Outlook profile is needed on the machine doing the import.

These limits become challenging when you must import PST files into Outlook’s primary mailbox from a dozen archives instead of one.

Professional Method: Export PST File to Outlook Mailbox with DRS Softech PST Converter

DRS Softech PST Converter is a competent tool that allows you to convert multiple PST files into Office 365 & other email clients. The application provides support for Graph API Authentication & importing mailbox details using a CSV file. You can also view mailbox data, select individual files/folders, & convert supported data. Some of its other features include Batch Conversion, Filter by Date, Remove Duplicate Items, Manage Attachments, Skip Previously Migrated Data, Migration Reports & PST Segmentation.

Features That Support This Migration

Feature	What it does for this import
Batch File Processing	Loads several PST files in one batch
Preview panel	Shows folders and emails before you convert anything
Open in Browser option	If preview fails, click this option to preview the email content
Date Range Filter	Limits the export to a period, which suits partial restores
Skip Previously Migrated Data	Keeps a second run from repeating items already migrated
Duplicate email detection	Compares the to, from, subject, cc, and body fields
Attachment Handling	Allows users to include or exclude email attachments during PST conversion or migration.

How to Import PST File into Outlook Primary Mailbox Using Professional Tool

1. Download, install, and launch the DRS Softech PST Converter software on your Windows PC.
2. Click on ‘Select PST File(s)/Select Folder’ or the ‘Drag & Drop’ option to choose the PST file(s). Click on the ‘Proceed’ button.
3. Navigate through the folders, emails, attachments, contacts, calendars, etc. using the preview panel. Click on ‘Proceed’.
4. Choose Output as Email Client and select the destination as Office 365. Enter all the necessary login details.
5. Configure the General Settings and the Advanced Settings (Date filter, Find duplicate emails, Attachments settings & Skip Existing Export). Click on Start Export.
6. Review the migration report to confirm if the right folders have been migrated, how many messages were migrated, and the export status.

If you want to open and split a large PST file, then you can follow the above steps very easily. But before converting the file, you should read the detailed document carefully to avoid data loss and data discrepancies during conversion.

Manual vs. Professional Converter at a Glance

This comparison helps users understand the process of add PST file to primary mailbox when handling multiple archives.

Task	Import/Export Wizard	DRS Softech PST Converter
Files per run	One PST file at a time	Several, through Select Folder
Content check before import	Folder names only	Emails, attachments, and message counts in the Preview Panel
Duplicate control	Replace, allow, or skip	Duplicate email removal and skipping previously exported items
Protected or damaged files	Asks for the password when a protected file is chosen	Flags corrupted, blank, or locked files before processing
Outlook required	Yes, classic Outlook with a profile	No
Destination	A mailbox in the open profile	Office 365, IMAP, Google Workspace, Outlook.com, or GoDaddy

Real-Life Scenario: Restoring Old PST Archives After a Laptop Refresh

The accountant restores her laptop and has seven annual PSTs to add PST file to primary mailbox in Microsoft 365. Importing the PSTs with the Outlook wizard will require seven separate imports. She instead adds all files via Select Folder in DRS Softech PST Converter, then previews their contents. Click on the Date Range filter option and ensure that the Skip Existing Export is selected. Then click on Import and review your final report.

Explore more with DRS Softech! Discover our complete overview of email migration services and solutions for different email platforms and file formats. Find the right solution to make your next email migration simple and seamless.

Conclusion

Import PST File to Primary Mailbox using the Import/Export Wizard or a PST Converter for importing several PST archives. Easily search and preview mailbox content. Filter emails according to dates. Find duplicate emails. Manage attachments. Perform bulk operations with multiple PST files. The tool allows you to migrate directly to different email clients. Try the PST Converter Free Demo version to learn about its features and upgrade to the full version to complete the migration.

Frequently Asked Questions