This policy allows users to test applications in Internet Explorer mode by opening an Internet Explorer mode tab in Microsoft Edge.
Users can do so from within the "More tools" menu by selecting 'Open sites in Internet Explorer mode'.
Additionally, users can test their applications in a modern browser without removing applications from the site list using the option 'Open sites in Edge mode'.
This setting works in conjunction with:
'InternetExplorerIntegrationLevel' (Configure Internet Explorer integration) is set to 'IEMode'
and
'InternetExplorerIntegrationSiteList' (Configure the Enterprise Mode Site List) policy where the list has at least one entry.
If you enable this policy, the option to 'Open sites in Internet Explorer mode' will be visible under "More tools". Users can view their sites in Internet Explorer mode on this tab. Another option to 'Open sites in Edge mode' will also be visible under "More tools" to help testing sites in a modern browser without removing them from the site list.
If you disable or don't configure this policy, users can't see the options 'Open in Internet Explorer mode' and 'Open in Edge mode' under "More tools" menu. However, users can configure these options with the --ie-mode-test flag.
| Registry Hive | HKEY_LOCAL_MACHINE or HKEY_CURRENT_USER |
| Registry Path | Software\Policies\Microsoft\Edge |
| Value Name | InternetExplorerIntegrationTestingAllowed |
| Value Type | REG_DWORD |
| Enabled Value | 1 |
| Disabled Value | 0 |