One last feature related to groups is the ability to select multiple extensions and edit them as a group. To do this, click on Extensions on the left side of the 3CX Management Console as shown in the following screenshot. Now hold the Ctrl key while you click on extensions to select multiple extensions. When you have selected the extensions you want to edit, click on Edit Extension to edit this group:

You will notice on the Edit Extension page that you are editing three extensions at once. Settings that are specific to one extension or which are not editable are grayed out and locked. Settings that you can change for this group, such as Enable Voice mail or Play Caller ID, are not locked. Make the changes you want and then click Apply as shown in the next screenshot: