How to Change the Default Browser in Outlook
When you click a link inside an Outlook email, it doesn't always open in the browser you expect. That's because Outlook doesn't have its own browser setting buried in its preferences — it follows the system-level default browser set by your operating system. Understanding where that setting actually lives, and how different versions of Outlook behave, makes the fix much more straightforward.
Why Outlook Doesn't Have Its Own Browser Setting
Outlook is designed to hand off web links to the OS rather than manage browser preferences independently. When you click a hyperlink in an email, Outlook calls the system's default browser protocol handler — typically registered to whichever browser your operating system currently recognizes as the default.
This means there's no "open links with" dropdown inside Outlook's own settings panel. The fix happens at the Windows or macOS level, not inside the Outlook app itself.
How to Change the Default Browser on Windows
On Windows 10 and Windows 11, the default browser is set through the system Settings app:
- Open Settings (Windows key + I)
- Go to Apps → Default apps
- Scroll to find your preferred browser (Chrome, Firefox, Edge, Brave, etc.)
- Click it and set it as the default
Windows 11 adds a layer of friction here. Rather than a single toggle, it requires you to assign your chosen browser to individual file types and protocols — specifically .htm, .html, HTTP, and HTTPS. Some browsers (like Chrome and Firefox) include a prompt when you first open them asking to be set as default, which handles these assignments automatically. If you skipped that prompt, you'll need to reassign each protocol manually in Default Apps settings.
Microsoft Edge is the factory default on Windows and is deeply integrated into the OS. If Edge keeps reasserting itself as the default after you've changed it, that's a known behavior tied to Windows update cycles — reassigning the default resolves it each time.
How to Change the Default Browser on macOS
On macOS, the process runs through System Settings (or System Preferences on older versions):
- Open System Settings → Desktop & Dock (macOS Ventura and later) or General (macOS Monterey and earlier)
- Find Default web browser
- Choose your preferred browser from the dropdown
Once set, any link clicked in Outlook for Mac will open in that browser automatically.
Outlook for the Web (OWA) — A Different Situation 🌐
If you're using Outlook on the web (outlook.com, Office 365 via browser, or an Exchange-hosted web client), the behavior is different. Links in web-based Outlook open within the same browser you're already using — because you're already in a browser. There's no separate default browser setting to change; the browser you use to access Outlook is the browser.
Outlook Mobile — iOS and Android
On iOS, default browser behavior for links in Outlook depends on your iOS version:
- iOS 14 and later allows third-party browsers to be set as the system default via Settings → Default Browser App
- Older iOS versions will always open links in Safari regardless of other apps installed
On Android, the default browser can usually be set through Settings → Apps → Default apps → Browser app, though the exact path varies by device manufacturer and Android version. Outlook for Android respects whatever browser is registered as the system default.
When the Setting Is Correct but Links Still Misbehave
There are a few scenarios where the system default is set correctly, but links in Outlook still don't open in the right browser:
| Situation | What's Happening |
|---|---|
| Corporate/managed device | IT policy may enforce a specific browser via Group Policy or MDM |
| Outlook PWA or web app | Links open in the current browser session, not the system default |
| Malformed hyperlinks | Some links use redirects that open an intermediary page first |
| Windows update reset | Microsoft updates can silently reassign Edge as the default |
| Older Outlook versions | Some legacy builds (pre-2016) had inconsistent protocol handling |
On managed or enterprise devices, IT administrators can lock default browser assignments through Group Policy. In those environments, users may not have permission to change the default app at all — this is worth checking if your changes don't stick.
The Classic Outlook vs. New Outlook Distinction
Microsoft has been rolling out a "New Outlook" experience alongside the classic desktop client. Both versions defer to the OS default browser for link handling — but if you're toggling between the two, it's worth confirming which version is active. The New Outlook interface is web-rendered and may behave slightly differently depending on how your Microsoft 365 account is configured.
Variables That Affect Your Specific Setup 🔧
Getting this right depends on factors that vary from one person to the next:
- Which version of Outlook you're running (classic desktop, new Outlook, web, mobile)
- Which OS and version (Windows 10 vs. 11, macOS Ventura vs. Monterey, iOS 14+ vs. earlier)
- Whether the device is personal or managed by an organization
- Which browsers are installed and whether they've requested default status
- Whether Windows updates have reset your default since you last changed it
The setting itself is simple — but where it lives and whether you can change it at all depends entirely on your specific combination of these factors.