To enable mutual authentication for all applications

The Application Server uses the `certificate` realm for HTTPS authentication.

1. Expand the Configuration node.

2. Expand the Security node.

3. Expand the Realms node.

4. Select the `certificate` realm.

5. Click the Add Property button.

   1. In the Name field, enter `clientAuth`.

   2. In the Value field, enter `true`.

6. Click Save.

7. Restart the Application Server if Restart Required displays in the console.

   After restarting the server, client authentication is required for all applications that use the `certificate` realm.