How to Archive Emails in Outlook: A Complete Guide

Archiving emails in Outlook is one of those features that sounds simple but works differently depending on how your account is configured, which version of Outlook you're using, and whether you're on a personal setup or a managed work environment. Understanding what archiving actually does — and what it doesn't — goes a long way toward using it effectively.

What Does "Archive" Actually Mean in Outlook?

In Outlook, archiving moves emails out of your active mailbox folders (like your Inbox) and into a separate storage location. The goal is to reduce the size of your primary mailbox while keeping old messages accessible.

This is different from deleting. Archived emails aren't gone — they're stored elsewhere, either in a local file on your computer or in a cloud-based folder, depending on your setup.

There are two distinct archiving systems in Outlook worth understanding:

• AutoArchive — an older, automatic system that moves emails to a local .pst file on your hard drive
• Archive folder (One-click Archive) — a newer method, particularly common in Outlook with Microsoft 365, that moves emails to a designated Archive folder within your mailbox

These two systems behave differently, and the one available to you depends on your Outlook version and account type.

How to Manually Archive Emails in Outlook

Using the Archive Button (Microsoft 365 / Modern Outlook)

If you're using Outlook with a Microsoft 365 or Exchange account, the simplest method is the built-in Archive button:

1. Select one or more emails in your folder
2. Click the Archive button in the Home ribbon, or right-click and choose Archive
3. The emails move to your Archive folder, which appears in the left-hand folder panel

You can also use the keyboard shortcut Backspace to archive a selected message directly on Windows desktop versions.

This Archive folder remains part of your mailbox and is fully searchable. It syncs across devices if you're using Exchange or Microsoft 365.

Using File > Cleanup Tools > Archive (Desktop Outlook)

For users on Outlook 2016, 2019, or earlier desktop versions:

1. Go to File → Cleanup Tools → Archive
2. A dialog box appears where you can choose which folder to archive
3. Set a cutoff date — emails older than this date will be archived
4. Choose the destination .pst file (or accept the default location)
5. Click OK

This method creates or adds to a local .pst archive file stored on your computer. That file shows up in Outlook under Archive Folders in the sidebar.

How AutoArchive Works

AutoArchive runs automatically in the background on Outlook desktop versions. By default, it's set to archive items older than a certain age (often 6 months, though this varies), moving them to a .pst file.

To check or configure AutoArchive settings:

1. Go to File → Options → Advanced
2. Click AutoArchive Settings
3. Adjust the frequency, age threshold, and destination folder

You can also set AutoArchive rules per folder by right-clicking a folder, selecting Properties, and choosing the AutoArchive tab.

⚠️ Important: AutoArchive may be disabled or controlled by your IT administrator if you're on a work or school account. In those cases, you may not see these options at all.

Archive in Outlook on the Web (OWA)

If you access Outlook through a browser:

1. Select one or more emails
2. Click the Archive icon (the box with a downward arrow) in the toolbar, or right-click and choose Archive

Emails move to the Archive folder in your mailbox. This works the same way as the one-click archive in the desktop app when connected to Exchange or Microsoft 365.

Local Archive (.pst) vs. Cloud Archive Folder

This distinction matters significantly depending on your situation:

If you're on a POP3 or IMAP account (common with personal email providers), the cloud Archive folder may not be available. In those cases, local .pst archiving is often the only built-in option.

Factors That Affect How Archiving Works for You

Several variables determine which archiving method applies to your setup:

• Account type — Exchange, Microsoft 365, POP3, IMAP, and Outlook.com accounts all behave differently
• Outlook version — The ribbon layout, available options, and AutoArchive behavior differ between Outlook 2016, 2019, 2021, and Microsoft 365
• Operating system — Outlook on Mac has different archiving options than Outlook on Windows; the web version has its own interface
• IT/admin policies — Managed work accounts often have archiving settings locked or redirected to compliance archives
• In-Place Archive (Exchange Online) — Some Microsoft 365 plans include a separate In-Place Archive mailbox, which is a distinct feature from the standard Archive folder and requires admin activation

🗂️ Whether your archived emails live locally or in the cloud, how much control you have over retention settings, and whether AutoArchive is even an option — all of this shifts depending on which version of Outlook you're running and how your account is provisioned.

What Archiving Doesn't Do

It's worth being clear about what archiving is not:

• It does not back up your emails in the traditional sense
• It does not free up cloud storage unless the archive destination is local
• It does not permanently delete emails or remove them from legal holds in enterprise environments
• A local .pst archive is only as safe as your computer — it can be lost if the drive fails

Understanding your own setup — your account type, Outlook version, and whether you're on a personal or managed device — is really the deciding factor in which archiving approach makes sense and what limitations you'll run into.