Actually, you could do it yourself if you have access to the web interface. When our system was installed/moved, considering it is long out of production with no service agreement etc etc, the installer gave me access to the web interface and showed me where to make certain changes for certain features. See if you can get your installer to do the same for you.

The answer to your question more than likely has to do with groups.

You could also try copying certain settings from an extension that has the settings you want to the extensions that needs them. Note: Your mileage may vary, enter at your own risk.