Microsoft Outlook has introduced a behavior that many users find intrusive: by default, links clicked within email messages often open in Microsoft Edge, regardless of the default browser set in the operating system. This is frequently linked to a feature designed to show the email and the web content side-by-side in a split-screen view. While intended to boost productivity, it often disrupts established workflows for those who rely on specialized browser extensions, saved passwords, or specific tab management styles in Google Chrome, Firefox, or Brave.

Returning Outlook to your preferred browser requires a two-step verification process: adjusting the internal application preferences and ensuring the host operating system is correctly configured.

Quick Solution for Link Handling in Outlook

For those looking for an immediate fix, the primary toggle is located within the Outlook settings menu.

  1. Open Outlook.
  2. Navigate to Settings (the gear icon) or File > Options.
  3. Select General or Advanced.
  4. Locate the Link Handling or File and Browser Preferences section.
  5. Change the dropdown menu from Microsoft Edge to Default Browser.

If these steps do not immediately resolve the issue, or if the options appear missing, follow the comprehensive guide below covering specific versions and platforms.

Understanding the Microsoft Edge Sidebar Integration

The shift toward forcing links into Microsoft Edge is not a technical bug but a deliberate design choice known as the "Edge Sidebar" or "Microsoft 365 Link Handling" initiative. Microsoft's rationale is that opening a link in Edge allows the Outlook application to remain visible in a sidebar, preventing the user from having to toggle between windows.

In our testing, we observed that while this saves a few clicks for casual users, power users face significant friction. For instance, if you use a password manager like 1Password or LastPass as a Chrome extension, it will not be available in the Edge sidebar unless you have separately configured it there. Furthermore, the rendering engine of the sidebar is a streamlined version of Edge, which may not respect all browser-based ad blockers or custom CSS themes.

How to Change the Default Browser in the New Outlook for Windows

The "New Outlook" (often replacing the Mail and Calendar apps) uses a web-based architecture. Consequently, its settings interface mirrors the Outlook Web experience.

Navigating the Modern Interface

In current builds of New Outlook (typically version 1.2024 or 1.2025), follow this path:

  • Click the Gear Icon in the top right corner to open Settings.
  • Go to the General tab in the left-hand navigation pane.
  • Select the Files and links sub-menu.
  • Under the section titled Link handling, you will see a dropdown menu for "Open hyperlinks from Outlook in:".
  • Select Default Browser from the list.

What to Do If "Files and Links" is Missing

Recent reports from the Microsoft Q&A community suggest that certain software builds (e.g., version 1.2025.1209.500) may temporarily lack this menu option due to staged rollouts or regional feature updates. If you do not see "Files and links":

  1. Check for updates in the Microsoft Store to ensure you are on the latest stable build.
  2. If the update does not fix it, you may need to wait for the general release or use the Registry Editor method described later in this article.

Configuring Classic Outlook Desktop (Microsoft 365 & Office 2021)

Classic Outlook remains the standard for many corporate environments. Because it is a standalone Win32 application, its settings are deeper within the traditional "Options" menu.

Step-by-Step for Desktop Apps

  1. Open the Outlook desktop application.
  2. Click the File tab in the upper-left corner of the ribbon.
  3. Select Options at the bottom of the sidebar.
  4. In the Outlook Options window, click the Advanced tab.
  5. Scroll down to the section labeled File and browser preferences.
  6. Find the setting: "Open hyperlinks from Outlook in:".
  7. Switch the selection from Microsoft Edge to Default Browser.
  8. Click OK to save changes.

It is often necessary to restart Outlook for these changes to take effect across all active background processes.

Synchronizing Windows System Default Browser Settings

Even if Outlook is set to "Default Browser," it will still open Edge if Windows itself thinks Edge is the boss. Modern Windows versions (10 and 11) have made changing defaults slightly more complex than in previous eras.

For Windows 11 Users

Windows 11 requires a more granular approach to file associations.

  1. Press Windows Key + I to open Settings.
  2. Go to Apps > Default apps.
  3. In the search box ("Set a default for a file type or link type"), type the name of your preferred browser (e.g., "Chrome").
  4. Click on the browser icon.
  5. Click the Set default button at the top of the page.
  6. Crucially, scroll down and verify that the protocols HTTP and HTTPS are assigned to your chosen browser. If they still show the Edge icon, click them individually and switch them.

For Windows 10 Users

  1. Go to Settings > Apps > Default apps.
  2. Under the Web browser section, click the current browser (usually Microsoft Edge).
  3. Select your preferred browser from the pop-up list.

Changing Link Handling on macOS

While macOS users are less likely to deal with the Edge-enforcement seen on Windows, Outlook for Mac can occasionally default to the "In-App Browser" or Edge if it was recently installed.

  1. Open System Settings (or System Preferences).
  2. Navigate to Desktop & Dock.
  3. Locate the Default web browser dropdown menu.
  4. Ensure your preferred browser (Safari, Chrome, etc.) is selected.
  5. In the Outlook for Mac app, click Outlook > Settings in the menu bar.
  6. Check the General or Reading section to ensure no "In-app browser" toggle is overriding system defaults.

Managing Outlook for Mobile (Android and iOS)

Mobile devices often use "In-App Browsers" to keep you within the application's ecosystem. This can be frustrating if you need access to your main browser's bookmarks or history.

On Android Devices

  1. Open the Outlook app.
  2. Tap your Profile icon (top left) and then the Gear icon (bottom left).
  3. Scroll down to the Preferences section and tap Links.
  4. You will see an option for "Open links with".
  5. Choose Default Browser or select a specific app like Chrome.

On iOS (iPhone/iPad)

  1. Open the Outlook app.
  2. Tap your Profile icon and then the Settings gear.
  3. Navigate to Integrations and Add-ins > Open Links With.
  4. Select System Default Browser or the specific browser installed on your device.

Note: In iOS, you must also ensure the system default is set correctly by going to iOS Settings > [Browser Name] > Default Browser App.

Advanced Troubleshooting: Using the Registry Editor (Regedit)

In scenarios where the Outlook UI is locked by an administrator or the specific "Files and links" menu is absent due to a software version glitch, the Windows Registry provides a manual override.

Warning: Modifying the Registry can cause system instability if done incorrectly. Always back up your registry before making changes.

Registry Path for Link Handling

  1. Press Win + R, type regedit, and hit Enter.
  2. Navigate to the following path: HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Common\Links
  3. Look for a DWORD value named BrowserChoice.
  4. If it does not exist, you can create it (Right-click > New > DWORD (32-bit) Value).
  5. Set the Value data:
    • 0: Respects the system default browser.
    • 1: Forces Microsoft Edge.
  6. Additionally, check for a key named BrowserSelection. Setting this to 0 usually forces the application to follow the OS-level default.

Automated Batch Script for Power Users

If you manage multiple machines, you can use a simple batch command to reset these values. Open Notepad, paste the following, and save it as fix_outlook.bat: