How to Export Outlook Emails: Methods, Formats, and What to Know First

Exporting emails from Outlook is one of those tasks that sounds straightforward until you're actually in front of the settings menu wondering which option does what. Whether you're backing up years of correspondence, migrating to a new account, or archiving a specific folder before leaving a job, the process varies depending on your version of Outlook, your account type, and what you plan to do with the exported data.

What "Exporting" Actually Means in Outlook

When you export emails from Outlook, you're creating a copy of your messages (and optionally your contacts, calendar, and other data) as a standalone file. The most common format is .PST (Personal Storage Table), which is a file format proprietary to Microsoft Outlook for Windows. Mac users working with Outlook for Mac deal with .OLM files instead — the two are not directly interchangeable.

A PST file can contain:

• Email messages and attachments
• Folder structure
• Contacts and contact groups
• Calendar events
• Tasks and notes

This is different from simply archiving within Outlook, which moves older items to a local archive folder but keeps them inside the Outlook environment. Exporting takes data outside of Outlook entirely.

The Standard Export Method in Outlook for Windows

For most desktop users on Outlook 2016, 2019, 2021, or Microsoft 365, the export process lives inside the Import/Export wizard:

1. Open Outlook and go to File
2. Select Open & Export, then Import/Export
3. Choose Export to a file, then click Next
4. Select Outlook Data File (.pst) and click Next
5. Choose the folder or account you want to export (check Include subfolders if needed)
6. Choose a save location and set options for handling duplicates
7. Click Finish — you can optionally set a password on the file

The resulting .PST file is saved locally. You can then move it to an external drive, upload it to cloud storage, or import it into another Outlook profile later.

Exporting Emails from Outlook on Mac

Outlook for Mac uses the .OLM format and has a slightly different path:

1. Go to File > Export
2. Choose the items you want to include (mail, contacts, calendar, etc.)
3. Select a save location and export

The OLM file can be imported back into Outlook for Mac but won't open directly in Outlook for Windows without conversion. If you're migrating between platforms, this becomes a meaningful consideration.

Exporting from Outlook.com (Web Version)

If you use Outlook.com through a browser rather than a desktop client, your options are more limited but still functional. Microsoft provides a way to request your data through the Microsoft Privacy Dashboard:

1. Go to account.microsoft.com and sign in
2. Navigate to Privacy > Download your data
3. Select the data types you want and submit the request
4. Microsoft prepares an export file, which you download when ready 📥

This process can take time and the output format is different from a PST file — you'll receive data in formats suited for portability rather than direct Outlook re-import.

Exporting Specific Folders vs. Full Mailboxes

One decision that shapes your approach is scope. Outlook's export wizard lets you select:

• A single folder (e.g., just your Inbox or a project-specific folder)
• An entire account, including all subfolders
• A date range, if you filter before exporting or use the Advanced Options within the wizard

Exporting selectively keeps file sizes manageable and makes it easier to find specific data later. Full-mailbox exports are better for complete migrations or long-term archiving.

Account Type Affects What You Can Export 🔍

Not all Outlook accounts behave identically during export, and this is where many users run into friction:

If you're on a corporate Exchange account, your IT department may have disabled the export function entirely or require you to go through them for archiving.

File Size and What Affects It

PST files can grow large quickly. A mailbox with several years of emails and attachments can easily produce a PST in the range of several gigabytes. Factors that influence file size include:

• Volume of attachments — embedded images and attached documents are the biggest contributors
• Number of folders and items — more data means a larger file
• Compression settings — Outlook applies some compression during export, but it's limited

Very large PST files (historically anything over 20–50 GB, depending on the Outlook version) can sometimes cause performance issues if re-imported. For large archives, splitting the export by year or folder is a common workaround.

What Happens to Formatting, Attachments, and Metadata

When you export to PST and later re-import, message formatting, attachments, timestamps, sender information, and folder structure are all preserved. The PST format is designed specifically for this — it's not a lossy conversion like copying and pasting email text.

Attachments remain embedded in the messages. If you need to extract attachments separately, that's a different process from exporting the mailbox itself.

Where Your Own Setup Changes Everything

The mechanics above apply broadly, but the right approach for any individual depends on details that vary significantly: whether you're on a personal or work account, which version of Outlook you're running, whether you're staying on Windows or switching to Mac, how much data you're working with, and what you plan to do with the file once you have it. Two people asking the same question — "how do I export my Outlook emails?" — can need genuinely different steps once those variables come into view.