You can prevent users that you associate with BlackBerry® Enterprise Server from browsing the intranet or Internet, running applications that communicate with application servers and content servers, sending or receiving instant messages, or making calls using VoIP. You can turn off the BlackBerry services if you want to enhance security, save bandwidth on the wireless network, or conserve system resources on the computer.

1. In the BlackBerry Administration Service, expand BlackBerry Solution Topology > BlackBerry Domain > Component view > BlackBerry Enterprise Servers.
2. Click the instance that you want to change.
3. Click Edit Instance.
4. In the External services turned on drop-down list, click No.
5. Click Save all.
6. Restart the BlackBerry Enterprise Server.