How to Change the Default Browser in Outlook

When you click a link inside an Outlook email, it opens in a browser — but not necessarily the one you prefer. That browser is determined by your default browser setting, and where you control that setting depends on whether you're using Outlook on Windows, macOS, or as a web app. Understanding how these layers interact helps you avoid the frustration of links always opening somewhere unexpected.

Why Outlook Doesn't Control the Browser Itself

Here's something that trips people up: Outlook doesn't have its own internal browser setting in most versions. When you click a hyperlink in an email, Outlook hands that URL off to your operating system, which then opens it in whatever browser is set as the system default.

This means changing your "Outlook browser" is really a two-step understanding:

1. On desktop (Windows or macOS): You change the default browser at the OS level.
2. In Outlook on the web (OWA): Links open in whichever browser you're already using — because OWA is a browser tab.

The exception worth knowing: some enterprise or older versions of Outlook (particularly older Windows builds) used Internet Explorer as an internal rendering engine for certain content. Microsoft has largely moved away from this, but it's relevant if you're in a managed corporate environment.

Changing the Default Browser on Windows 🖥️

This is the most common scenario for desktop Outlook users.

Windows 11

1. Open Settings (Win + I)
2. Go to Apps → Default apps
3. Search for your preferred browser (Chrome, Firefox, Edge, etc.)
4. Select it and click Set default

Windows 11 made this more granular — it may ask you to set defaults for specific file types and protocols (HTTP, HTTPS, .htm, .html). For links from Outlook to open correctly in your chosen browser, you'll want HTTP and HTTPS both pointed to that browser.

Windows 10

1. Open Settings → Apps → Default apps
2. Scroll to Web browser
3. Click the current browser listed and select your preferred one

Windows 10 applies the change more broadly, so setting it once typically covers all link types including those from Outlook.

Why Edge Keeps Reasserting Itself

Microsoft Edge is the default browser on Windows and, by design, Windows may reset or nudge defaults back toward Edge after certain updates. If you notice Outlook links reverting to Edge, check your default apps settings again after major Windows updates — this is a known behavioral pattern, not a bug in your setup.

Changing the Default Browser on macOS 🍎

For Outlook for Mac users:

1. Open System Settings (macOS Ventura and later) or System Preferences (older macOS)
2. Navigate to Desktop & Dock → scroll down to Default web browser (Ventura+), or go directly to General → Default web browser on older versions
3. Select your preferred browser from the dropdown

Once set, any link clicked in Outlook for Mac will open in that browser.

Outlook on the Web (OWA or Outlook.com)

If you're accessing Outlook through a browser at outlook.com or via your organization's webmail portal, there's no separate browser setting to configure. Links open in the same browser you're using to access Outlook — or sometimes in a new tab within it.

If you want links to open in a different browser, you'd need to access Outlook web in that browser instead. There's no per-app override here.

The New Outlook for Windows — A Nuance Worth Knowing

Microsoft has been rolling out the new Outlook for Windows, which is built on web technology (essentially a packaged web app). In this version, behavior around link handling may differ slightly from classic Outlook. Some users report that links open in Edge regardless of system defaults, depending on how the app is configured and whether your organization's IT policies are in play.

If you're on the new Outlook and links aren't respecting your system default, check:

• Whether your default browser settings actually include HTTP/HTTPS protocol assignments (not just file type associations)
• Whether your organization has applied any Group Policy settings that lock browser behavior

Variables That Shape Your Experience

When System Defaults Aren't Enough

In corporate environments, IT administrators sometimes lock default browser settings through Group Policy or MDM (Mobile Device Management) tools. If you've followed the steps above and the setting keeps reverting — or the option appears grayed out — the override is likely happening at the policy level, not something a user-side setting change will fix.

Similarly, if you're using Outlook as part of Microsoft 365 on a managed device, your organization may have specific configurations that affect how links behave across all Microsoft apps, not just Outlook.

The straightforward path works for most personal and small-business setups. Where it gets more complicated is when your device, your organization's IT environment, and the specific version of Outlook you're running all have their own layers of influence — and not all of those are visible from a standard settings menu.