Policy CSP - ADMX_AppXRuntime

Tip

This CSP contains ADMX-backed policies which require a special SyncML format to enable or disable. You must specify the data type in the SyncML as <Format>chr</Format>. For details, see Understanding ADMX-backed policies.

The payload of the SyncML must be XML-encoded; for this XML encoding, there are a variety of online encoders that you can use. To avoid encoding the payload, you can use CDATA if your MDM supports it. For more information, see CDATA Sections.

AppxRuntimeApplicationContentUriRules

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 2004 [10.0.19041.1202] and later ✅ Windows 10, version 2009 [10.0.19042.1202] and later ✅ Windows 10, version 21H1 [10.0.19043.1202] and later ✅ Windows 11, version 21H2 [10.0.22000] and later

./Device/Vendor/MSFT/Policy/Config/ADMX_AppXRuntime/AppxRuntimeApplicationContentUriRules

This policy setting lets you turn on Content URI Rules to supplement the static Content URI Rules that were defined as part of the app manifest and apply to all Windows Store apps that use the enterpriseAuthentication capability on a computer.

• If you enable this policy setting, you can define additional Content URI Rules that all Windows Store apps that use the enterpriseAuthentication capability on a computer can use.

• If you disable or don't set this policy setting, Windows Store apps will only use the static Content URI Rules.

Description framework properties:

Property name	Property value
Format	chr (string)
Access Type	Add, Delete, Get, Replace

Tip

This is an ADMX-backed policy and requires SyncML format for configuration. For an example of SyncML format, refer to Enabling a policy.

ADMX mapping:

Name	Value
Name	AppxRuntimeApplicationContentUriRules
Friendly Name	Turn on dynamic Content URI Rules for Windows store apps
Location	Computer Configuration
Path	Windows Components > App runtime
Registry Key Name	Software\Microsoft\Windows\CurrentVersion\Policies\Packages\Applications
Registry Value Name	EnableDynamicContentUriRules
ADMX File Name	AppXRuntime.admx

AppxRuntimeBlockFileElevation

Scope	Editions	Applicable OS
✅ Device ✅ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 2004 [10.0.19041.1202] and later ✅ Windows 10, version 2009 [10.0.19042.1202] and later ✅ Windows 10, version 21H1 [10.0.19043.1202] and later ✅ Windows 11, version 21H2 [10.0.22000] and later

./User/Vendor/MSFT/Policy/Config/ADMX_AppXRuntime/AppxRuntimeBlockFileElevation

./Device/Vendor/MSFT/Policy/Config/ADMX_AppXRuntime/AppxRuntimeBlockFileElevation

This policy setting lets you control whether Windows Store apps can open files using the default desktop app for a file type. Because desktop apps run at a higher integrity level than Windows Store apps, there is a risk that a Windows Store app might compromise the system by opening a file in the default desktop app for a file type.

• If you enable this policy setting, Windows Store apps can't open files in the default desktop app for a file type; they can open files only in other Windows Store apps.

• If you disable or don't configure this policy setting, Windows Store apps can open files in the default desktop app for a file type.

Description framework properties:

Property name	Property value
Format	chr (string)
Access Type	Add, Delete, Get, Replace

Tip

This is an ADMX-backed policy and requires SyncML format for configuration. For an example of SyncML format, refer to Enabling a policy.

ADMX mapping:

Name	Value
Name	AppxRuntimeBlockFileElevation
Friendly Name	Block launching desktop apps associated with a file.
Location	Computer and User Configuration
Path	Windows Components > App runtime
Registry Key Name	Software\Microsoft\Windows\CurrentVersion\Policies\Associations
Registry Value Name	BlockFileElevation
ADMX File Name	AppXRuntime.admx

AppxRuntimeBlockHostedAppAccessWinRT

Scope	Editions	Applicable OS
✅ Device ❌ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 2004 [10.0.19041.1202] and later ✅ Windows 10, version 2009 [10.0.19042.1202] and later ✅ Windows 10, version 21H1 [10.0.19043.1202] and later ✅ Windows 11, version 21H2 [10.0.22000] and later

./Device/Vendor/MSFT/Policy/Config/ADMX_AppXRuntime/AppxRuntimeBlockHostedAppAccessWinRT

This policy setting controls whether Universal Windows apps with Windows Runtime API access directly from web content can be launched.

• If you enable this policy setting, Universal Windows apps which declare Windows Runtime API access in ApplicationContentUriRules section of the manifest can't be launched; Universal Windows apps which haven't declared Windows Runtime API access in the manifest aren't affected.

• If you disable or don't configure this policy setting, all Universal Windows apps can be launched.

This policy shouldn't be enabled unless recommended by Microsoft as a security response because it can cause severe app compatibility issues.

Description framework properties:

Property name	Property value
Format	chr (string)
Access Type	Add, Delete, Get, Replace

Tip

This is an ADMX-backed policy and requires SyncML format for configuration. For an example of SyncML format, refer to Enabling a policy.

ADMX mapping:

Name	Value
Name	AppxRuntimeBlockHostedAppAccessWinRT
Friendly Name	Block launching Universal Windows apps with Windows Runtime API access from hosted content.
Location	Computer Configuration
Path	Windows Components > App runtime
Registry Key Name	Software\Microsoft\Windows\CurrentVersion\Policies\System
Registry Value Name	BlockHostedAppAccessWinRT
ADMX File Name	AppXRuntime.admx

AppxRuntimeBlockProtocolElevation

Scope	Editions	Applicable OS
✅ Device ✅ User	✅ Pro ✅ Enterprise ✅ Education ✅ Windows SE ✅ IoT Enterprise / IoT Enterprise LTSC	✅ Windows 10, version 2004 [10.0.19041.1202] and later ✅ Windows 10, version 2009 [10.0.19042.1202] and later ✅ Windows 10, version 21H1 [10.0.19043.1202] and later ✅ Windows 11, version 21H2 [10.0.22000] and later

./User/Vendor/MSFT/Policy/Config/ADMX_AppXRuntime/AppxRuntimeBlockProtocolElevation

./Device/Vendor/MSFT/Policy/Config/ADMX_AppXRuntime/AppxRuntimeBlockProtocolElevation

This policy setting lets you control whether Windows Store apps can open URIs using the default desktop app for a URI scheme. Because desktop apps run at a higher integrity level than Windows Store apps, there is a risk that a URI scheme launched by a Windows Store app might compromise the system by launching a desktop app.

• If you enable this policy setting, Windows Store apps can't open URIs in the default desktop app for a URI scheme; they can open URIs only in other Windows Store apps.

• If you disable or don't configure this policy setting, Windows Store apps can open URIs in the default desktop app for a URI scheme.

Note

Enabling this policy setting doesn't block Windows Store apps from opening the default desktop app for the http, https, and mailto URI schemes. The handlers for these URI schemes are hardened against URI-based vulnerabilities from untrusted sources, reducing the associated risk.

Description framework properties:

Property name	Property value
Format	chr (string)
Access Type	Add, Delete, Get, Replace

Tip

This is an ADMX-backed policy and requires SyncML format for configuration. For an example of SyncML format, refer to Enabling a policy.

ADMX mapping:

Name	Value
Name	AppxRuntimeBlockProtocolElevation
Friendly Name	Block launching desktop apps associated with a URI scheme
Location	Computer and User Configuration
Path	Windows Components > App runtime
Registry Key Name	Software\Microsoft\Windows\CurrentVersion\Policies\Associations
Registry Value Name	BlockProtocolElevation
ADMX File Name	AppXRuntime.admx

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