How To Enable Internet Explorer Mode In Edge | IE Mode Setup

Enabling Internet Explorer mode in Edge lets you run legacy IE-only sites directly in your current browser without installing extra software.

When a legacy site refuses to load in any modern browser, how to enable Internet Explorer mode in Edge becomes the practical answer Microsoft built for exactly this situation. Internet Explorer 11 retired in June 2022, but thousands of business and government intranet pages still depend on the old Trident engine. IE mode loads those pages using the IE11 engine from inside a modern Edge tab — no second browser, no virtual machine, no workarounds. The setup takes about two minutes, but one skipped step keeps it from working.

What Is Internet Explorer Mode

Internet Explorer mode (IE mode) is a built-in compatibility feature in Microsoft Edge that renders specific sites using the legacy Trident MSHTML engine from IE11, right inside a standard Edge tab. The page behaves exactly as if it were open in Internet Explorer 11 — ActiveX controls, legacy authentication, old JavaScript, all of it. You see a blue IE icon next to the address bar when the mode is active, and you can return to modern rendering anytime by closing the tab or clicking Leave on the info bar.

Microsoft created IE mode as the official replacement for the retired IE11 desktop app. It was designed primarily for organizations that depend on internal tools built for Internet Explorer, but non-enterprise users can use it too with a few extra manual steps.

Enabling Internet Explorer Mode In Edge: The Step Order That Works

On a standard Windows 10 or 11 device, you enable IE mode through Edge’s Default browser settings, restart the browser, then manually add specific site URLs to trigger the compatibility engine. Microsoft’s official documentation on Internet Explorer mode in Edge confirms this sequence works on current builds.

1. Open Edge and click the three-dot menu (ellipsis) in the upper-right corner.
2. Select Settings.
3. Click Default browser in the left sidebar.
4. Find the Internet Explorer compatibility section.
5. Open the drop-down next to Allow sites to be reloaded in Internet Explorer mode (IE mode) and select Allow.
6. Click the Restart button to close and relaunch Edge — the setting won’t apply without this restart.
7. After Edge reopens, go back to Settings > Default browser.
8. Under Internet Explorer mode pages, click Add a page.
9. Paste the full URL of the legacy site you need — for example, https://old-internal-tool.company.com — and click Add.
10. Navigate to that URL in Edge. The page reloads in IE mode automatically.

Once a site is added to the list, every visit to that URL opens in IE mode. You’ll see a blue Internet Explorer icon next to the address bar as confirmation that the mode is active.

How To Make The IE Mode Button Always Visible

If you’d rather trigger IE mode on demand instead of pre-configuring a site list, add the IE mode button to Edge’s toolbar:

1. Go to Settings > Appearance.
2. Scroll to Show buttons on toolbar.
3. Find Internet Explorer mode (IE mode) button and toggle it to On.
4. The blue IE icon appears on the toolbar. Click it at any time to reload the current page in IE mode.

This is the fastest option when you only need IE for occasional sites and don’t want to maintain a list. The icon stays visible across browser sessions until you turn it off.

Enterprise Setup For IT Admins

Organizations can push IE mode to every managed device through Group Policy, which makes the feature invisible to end users — the legacy sites just work without anyone touching Settings. The manual step-by-step from the previous section is replaced by a single policy deployment.

1. Download the latest Microsoft Edge administrative template from Microsoft’s documentation site.
2. Open Group Policy Editor and navigate to User Configuration > Administrative Templates > Microsoft Edge.
3. Double-click Configure Internet Explorer integration, set it to Enabled, and choose Internet Explorer mode under Options.
4. Under Windows Components > Internet Explorer, enable Use the Enterprise Mode IE website list and point it to your XML site list.
5. Optionally enable Send all intranet sites to Internet Explorer to route every internal site through IE mode automatically.

Group Policy eliminates the manual site-list step for users and lets IT control exactly which domains use the legacy engine. The browser handles the rest silently.

Why Is IE Mode Not Working?

Most IE mode failures come from one of three causes — skipping the restart after enabling the setting, forgetting to add the site URL to the list, or running a newer Windows 11 build that hides the UI toggle. Here’s what to check for each:

• Restart skipped. The “Allow” setting won’t activate until Edge restarts. Go back to Settings > Default browser and click the Restart button if you missed it.
• Site list empty. Non-enterprise users must add each URL manually. The “Allow” setting alone does nothing without at least one site in the list under Internet Explorer mode pages.
• Toolbar button missing. If you prefer the manual reload method, the IE mode button must be enabled in Settings > Appearance first.
• Windows 25H2 issue. On Edge 141 and newer Windows 11 builds, Microsoft has hidden the IE mode UI in some regions. A PowerShell command run as Administrator can restore it: Set-ItemProperty -Path "HKLM:\SOFTWARE\Policies\Microsoft\Edge" -Name "InternetExplorerIntegrationLevel" -Type DWord -Value 1. Restart Edge afterward.
• Unsupported browser error. If the legacy site itself shows an “unsupported browser” warning, try reloading using the IE mode toolbar button instead of the auto-list method — it sometimes triggers a different browser string that the legacy site accepts.

When To Use IE Mode (And When To Skip It)

Use IE mode only for legacy internal sites, government portals, or old business tools that refuse to load in a modern browser. Skip it for everyday browsing because the IE11 engine lacks current security patches.

IE mode renders pages with a retired browser engine that Microsoft no longer secures. That makes it a risk for any site handling personal data, payments, or login credentials. The feature is designed for intranet tools and line-of-business applications that can’t be upgraded — not for visiting external websites. Modern Edge with the Chromium engine handles 99% of the web. Reserve IE mode for the narrow slice of pages that genuinely need it, and leave the tab as soon as you’re done.

The fastest path to working IE mode on a non-enterprise device takes three steps: enable the Allow setting in Default browser, restart Edge, and add one site URL to the list. The whole process runs under two minutes. For IT-managed devices, Group Policy handles everything silently. Stick with IE mode only for the legacy sites that need it, and close the tab when you’re done to keep your browsing session on Edge’s secure modern engine.