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InternetExplorerIntegrationLocalFileExtensionAllowList

  • Article

Open local files in Internet Explorer mode file extension allow list

Supported versions

  • On Windows since 88 or later

Description

This policy limits which file:// URLs are allowed to be launched into Internet Explorer mode based on file extension.

This setting works in conjunction with: InternetExplorerIntegrationLevel is set to 'IEMode'.

When a file:// URL is requested to launch in Internet Explorer mode, the file extension of the URL must be present in this list in order for the URL to be allowed to launch in Internet Explorer mode. A URL which is blocked from opening in Internet Explorer mode will instead open in Edge mode.

If you set this policy to the special value "*" or don't configure it, all file extensions are allowed.

To learn more about Internet Explorer mode, see https://go.microsoft.com/fwlink/?linkid=2094210

Supported features

  • Can be mandatory: Yes
  • Can be recommended: No
  • Dynamic Policy Refresh: Yes
  • Per Profile: Yes
  • Applies to a profile that is signed in with a Microsoft account: Yes

Data type

  • List of strings

Windows information and settings

Group Policy (ADMX) info

  • GP unique name: InternetExplorerIntegrationLocalFileExtensionAllowList
  • GP name: Open local files in Internet Explorer mode file extension allow list
  • GP path (Mandatory): Administrative Templates/Microsoft Edge
  • GP path (Recommended): N/A
  • GP ADMX file name: MSEdge.admx

Example value

.mht

.pdf

.vsdx

Registry settings

  • Path (Mandatory): SOFTWARE\Policies\Microsoft\Edge\InternetExplorerIntegrationLocalFileExtensionAllowList
  • Path (Recommended): N/A
  • Value name: 1, 2, 3, ...
  • Value type: List of REG_SZ

Example registry value

SOFTWARE\Policies\Microsoft\Edge\InternetExplorerIntegrationLocalFileExtensionAllowList\1 =

.mht

SOFTWARE\Policies\Microsoft\Edge\InternetExplorerIntegrationLocalFileExtensionAllowList\2 =

.pdf

SOFTWARE\Policies\Microsoft\Edge\InternetExplorerIntegrationLocalFileExtensionAllowList\3 =

.vsdx

See also