Display a custom URL message when users try to run a blocked app

This article for IT professionals describes the steps for displaying a customized message to users when an AppLocker policy blocks an app.

With the help of Group Policy, AppLocker can be configured to display a message with a custom URL. You can use this URL to redirect users to a support site that contains info about why the user received the error and which apps are allowed. If you don't display a custom message when an app is blocked, the default AppLocker block message is displayed as-is.

To complete this procedure, you must have the Edit Setting permission to edit a GPO. By default, members of the Domain Admins group, the Enterprise Admins group, and the Group Policy Creator Owners group have this permission.

To display a custom URL message when users try to run a blocked app

1. On the Start screen, type gpmc.msc to open the Group Policy Management Console (GPMC).
2. Navigate to the Group Policy Object (GPO) that you want to edit.
3. Right-click the GPO, and then select Edit.
4. In the console tree under Policies\Administrative Templates\Windows Components, select File Explorer.
5. In the details pane, double-click Set a support web page link.
6. Select Enabled, and then type the URL of the custom Web page in the Support Web page URL box.
7. Select OK to apply the setting.