After upgrading from 4.4.0
With 4.6 and above, all services are enabled and disabled individually - you don't have to have everything turned on. However, you must enable them for the item to appear in the menus.
Go to System / Servers /Core Services Enable services you want to run on the server
Go to System / Telephony Services - Enable services you desire
Go to System / Instant Messaging - Enable if you want to use the xmpp server features
Go to System / Devie provisioning - Enable services you desire
If you wish to install OpenACD run