To enable mutual authentication for all applications

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

1. Expand the Configurations node.

2. Select the instance to configure:

   - To configure a particular instance, expand the instance's config node. For example, the default instance, `server`, expand the `server-config` node.

   - To configure the default settings for all instances, expand the `default-config` node.

3. Expand the Security node.

4. Expand the Realms node.

5. Select the `certificate` realm.

6. Click the Add Property button.

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

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

7. Click Save.

8. 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.