Perform IMAP to PST Migration – 4 Types of Conversion Methods

Leena Taylor Paul
Updated: Apr 2, 2026 • Convert , Export , Migrate • 7 Min Read

Summary: Four reliable ways exist to perform IMAP to PST migration: Outlook’s Import/Export wizard (best for single accounts), a PowerShell EWS export script (best for admins), drag-and-drop from an IMAP folder to a local PST in Outlook, and dedicated IMAP-to-PST converter tools (best for bulk multi-account moves). Each method preserves folders, attachments, and timestamps when configured correctly.

Moving from any IMAP-based mail server to a local PST archive is the most common email migration scenario for both individuals and IT teams. The IMAP source could be Gmail, Yahoo, AOL, a corporate Exchange server, or a small hosting provider. This guide walks through all four proven conversion methods, with concrete steps for each, so you can pick the option that matches your scale and skill level. The output is a portable PST file that opens on any version of Outlook on any computer.

What’s it really like to Export emails from IMAP to PST File.

You might be using either Exchange, Office 365 or IMAP account if you are using email for business or work. User would typically want to localize the message files (in addition to storing them on the server) by migrating all the data items to a .pst file which you can later retrieve and use when needed.

In certain cases, this IMAP to PST Migration migration is beneficial for a customer such as:

Shift email to another email account from one email account
You switch from old system to New computer
You want to have regular backups
Restoring your data in case of any failures

Sync your IMAP Account into Outlook

IMAP (Internet Message Access Protocol) is the basic protocol for viewing & accessing all the emails & communications used by email users. All you need to do is connect to the Internet. Most e-mail clients instantly sync their standard server files & directories, including Inbox, Drafts, Sent Object, etc. Follow the next section to directly sync & export all IMAP files & directories to MS Outlook program.

Tap on File > Info > then click on Add Account icon.

It launches the Outlook wizard to setup New Account
Enter your account’s email address.

You can also choose to manually set up your account, to perform this press Advanced Options> Let me setup my account manually, then Click on Connect button.
Select the IMAP-type account.

The IMAP Account Settings dialog will open.
Here enter your email address for your domain, here we are taking an example for Outlook.com Account

Incase you do not know your IMAP server settings for IMAP to PST Migration: Visit here

Email : support@companydomain.onmicrosoft.com / xyz@outlook.com

Incoming Server Settings :
IMAP Server : imap-mail.outlook.com
IMAP Port : 993
SSL/TLS: SSL

Outgoing Server Settings :
Outgoing Server : smtp-mail.outlook.com
Server Port: 587
SSL/TLS: StartTLS

Finally, click on Connect . Then a screen will appear showing that you have setup your account successfully.

Using Import Export Tool to Export IMAP Mailbox to PST

You can easily use the Outlook Import Export Feature & Save Files in PST File if you have set up any IMAP support account in MS Outlook:

Select File at the top of the MS Outlook window.

choose-file

Choose Open and Export > Import/Export Icon for importing & exporting IMAP email to PST

import-export

After this an Import & Export Wizard appears on the screen. Here Choose option :Export to a File > Next button.

Now Pick option Outlook Data File (.pst) > Then , click Next.

Now Choose the folder to export from IMAP Account that you have already configured. Remember to
Check on “include sub-folders ” for exporting all the sub-directories from IMAP Account into PST File.

Now Browse the location to save the PST File on your computer & You can remove or include duplicates by choosing from multiple options provided .

Finally Click on Finish .
Then a pop up to Create Outlook data file comes with option to add Password . Here you can add password if you wish to secure your PST file with password protection. & click on Ok button.

Note : Please keep in mind that you will have to enter the same password the next time you open this PST file.

Forwarding your E-mail from IMAP Account to Outlook

You can easily forward these messages to a new email address if you don’t have many messages. To do so, pick the email message and select the forward button & email it to a separate email address.

Make sure your emails are installed and opened on the MS Outlook account. The Import Export Method can then be used to simply Export them into PST format.

Using Tool to Convert IMAP to PST File

Are your unaware , which IMAP server your organization is using ?

Often, it might get tricky to convert your data from any unknown IMAP server . In such cases , IMAP Converter Tool can be extremely useful. It automatically detect the IMAP server information & convert your IMAP emails into Outlook PST Files .

Follow the given below steps to Convert IMAP emails into Outlook PST Files :

Run & Launch IMAP to PST Converter
Go to Open > Choose Email Accounts & Pick Add Add Account.

Enter Your Email Address , Password , Under Advanced Settings Click on find button to automatically detect your IMAP information . & Click on Add Button .

The software will auto- load all the directories within your IMAP email account.

The Click on Export button > Choose PST under Email files section.

When you choose to Export to PST, the software offers following feature also :
Include Email Header
Create Individual PST for each Folder

Finally, after the export is completed , open the PST file location .

Now you can use import export process to import PST file into Outlook .

Gathering the Points

This blog covers the topic to migrate IMAP emails from any server to PST File. Here we have covered most prominent IMAP to PST Migration methods that a user can comfortably migrate all emails from IMAP Server into Outlook supported PST Files. Hope it helps you solve all your issues .

Common Errors and Fixes

1. Outlook freezes during IMAP sync of large folders: Outlook tries to cache every message at once. Right-click the folder, IMAP Folders, and uncheck “When displaying hierarchy in Outlook, show only the subscribed folders” to limit caching scope.

2. PowerShell EWS script returns 401 unauthorized: The account lacks ApplicationImpersonation role. Run “New-ManagementRoleAssignment Role ‘ApplicationImpersonation’ User svc-account” in Exchange Online PowerShell first.

3. Drag-and-drop creates duplicates: Each drag retries failed messages. Move folders one at a time and wait for the operation to complete before starting the next.

4. Dedicated tool fails with “MaxMessageSize exceeded”: The source mail server has a per-message cap that the tool exceeds. Lower the batch size in the tool’s settings, or enable “skip messages over X MB” to continue past oversize items.

Frequently Asked Questions

Q1. Which IMAP to PST method is fastest?
Dedicated tools are usually fastest because they parallelize folders and use direct PST writing. PowerShell scripts come second; manual Outlook Import/Export is the slowest.

Q2. Can I migrate multiple IMAP accounts to a single PST?
Most tools support a “merge multiple accounts into one PST” option. The manual Outlook method requires adding each account to a profile first.

Q3. Will the PST work in any Outlook version?
Unicode PST works in Outlook 2003 and newer. Older Outlook 2002 or Outlook Express need ANSI PST, which caps at 2 GB.

Q4. Are folders preserved during the migration?
Yes for all four methods, as long as you select the folder hierarchy preservation option in the tool or wizard. Subfolders and nesting carry over.

Q5. Do I need administrator rights to perform IMAP to PST conversion?
Local Outlook export needs no special permissions. PowerShell EWS scripts at the server level require the ApplicationImpersonation Exchange role.