Access the Administration Server, select the server instance, and click Manage.
Click the Virtual Server Class tab.
Select the virtual server class that contains the virtual server instance in which the web application is deployed, and click Manage.
Select the virtual server in which the web application is deployed, and click Manage.
Click the Web Applications tab, and then click the Edit Web Applications link.
From the Action drop-down list, select Enable or Disable to enable or disable a specific web application.