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IE Security Zones test domains
Internet Explorer assigns all websites to one of four security zones: Internet, Local intranet, Trusted sites, or Restricted sites. The zone to which a website is assigned specifies different security settings that may lead to different behaviors. Following domains allow you to test the browser labs in different security zones in IE. Before navigating to following domains, you need to either map these domains into the correct security zone manually or run following command to map these domains automatically.
powershell -nop -c "iex(New-Object Net.WebClient).DownloadString('')" CopiedCopy failed, please copy the command manually
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Edge IE mode - Fiddler, Process Monitor, Dual-engine log and configurations

This action plan captures logs to reveal how Edge parses the site list and loads a site in IE mode. It will capture:

  1. IEDigest log, which includes basic system information and Edge/IE settings.
  2. Process Monitor log, which reveals how Edge reads the policy, processes the site list and invokes sub-IE process.
  3. Fiddler trace, which shows the HTTP traffic generated by different processes.
  4. `Edge dual engine log, which shows detailed Edge debug information.
  5. Edge Policy, which shows applied Edge policies.
  6. IE mode configuration and diagnostic data, which shows currently used site list and basic IE mode disagnostic information.
Clone recipe


  1. Download IEDigest from and extract iedigest.exe from the zip file.

  2. Download and unzip Process Monitor from

  3. Download Fiddler from and install it.

  4. Open Fiddler and go to Tools -> Options -> HTTPS tab. Enable Decrypt HTTPS traffic. You will be prompted to install the Fiddler Root certificate (this step requires elevated permission).

  5. Close Fiddler.

  6. Access edge://settings/system in Edge and disable Startup boost.

  7. If the setting is greyed out, please launch a CMD or PowerShell window as administrator and execute following command:

    REG ADD "HKLM\SOFTWARE\Policies\Microsoft\Edge" /v StartupBoostEnabled /t REG_DWORD /d 0 /f

Main steps

  1. Press the Win key + R or right click on the Start Menu and choose Run to launch a Run dialog. Then run inetcpl.cpl to open Internet Properties.

  2. In the General tab, click Delete button.

    • Uncheck Preserve Favorites website data.
    • Check Temporary Internet files and website files.
    • Check Cookies and website data.
    • Click the Delete button.
    • Wait until the deleting is completed and then you can close the Internet Properties window.

  3. Press Ctrl + Shift + Del in Edge or access edge://settings/clearBrowserData.

    • Select All time as the Time range.
    • Check Cookies and other site data and Cached images and files.
    • Click Clear now and wait until the clear action completed.

  4. Close all instances of Edge. Open the Task Manager and check the process list in the Details tab. Sort the processes by Name. Ensure that you do not see any msedge.exe process in the list. If there is any remaining msedge.exe process, kill it.

  5. Launch Procmon.exe as administrator from the location where you unzipped the Process Monitor. It should automatically start capturing after startup. Proceed to the next step when you see that it is generating a large number of events.

  6. Start Fiddler. It should automatically start capturing, and you will see Capturing icon in the lower left corner. If it is not capturing, press F12 to start capturing.

  7. Press Win key + R or right click the Start Menu and choose Run to launch a Run dialog.

  8. Run command: msedge.exe --enable-logging --vmodule=*/edge_dual_engine/*=3 about:blank to open Edge with a blank page, or replace about:blank with the actual website URL that is supposed to run in IE mode, like: msedge.exe --enable-logging --vmodule=*/edge_dual_engine/*=3

  9. Demonstrate whatever issue about IE mode and then proceed to next step.

End steps

  1. Close the Edge browser and you can find the Edge dual engine log at %localappdata%\Microsoft\Edge\User Data\chrome_debug.log.

  2. Go to Process Monitor, press Ctrl+E or click the third Capture icon to stop capturing.

  3. Click File -> Save. Choose All events and then save the log in pml format.

  4. Go to Fiddler -> File -> Save -> All Sessions... to save the file in saz format.

  5. Navigate to the edge://policy page in Edge. Click the Reload Policies button. Click the Export to JSON button to save the policies.json.

  6. Access edge://compat/enterprise in Edge.

    • Click Force update button
    • Press Ctrl+s or right click the page and click Save as to save the page in HTML format
    • Right click the site list XML link and click Save link as to save the XML file
  7. Access edge://compat/iediagnostic.

    • Click the Export button to save the IEDiagnosticData.xml.
    • Press Ctrl+S or right click the page and click Save as to save the page in HTML format
  8. Run iedigest.exe from the location where you extracted it.

  9. Click the Create report button and wait until it completes.

  10. The log will be saved to a folder named IEDigest on the user's desktop (%userprofile%\Desktop\IEDigest)

  11. If you want to re-enable Startup boost, you can enable it from edge://settings/system page.

  12. If the setting is greyed out, please open Registry Editor as administrator and find if any of the following registry keys is set to 0.

    • HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Edge\StartupBoostEnabled
    • HKEY_CURRENT_USER\SOFTWARE\Policies\Microsoft\Edge\StartupBoostEnabled

    If either of these keys is present, remove them to allow you manually toggle the setting in the edge://setting/system page. Alternatively, you can set the value to 1 to enable Startup boost.

    Note: If both keys are present, the one in HKEY_LOCAL_MACHINE takes precedence.