Go to Main Navigation Bar > Users & Groups > Attendee Groups 

To update details of an Attendee group, such as the name of the group and administrators, click Edit Attendee Group in the menu when the attendee group is selected. 

Update the attendee group as required and click Save Changes.

To copy an attendee group, select the attendee group and click Duplicate from the menu

Enter a name for the new attendee group, as well as any attendee group administrators, and click Create.

To deactivate an Attendee group, select the Attendee group and click Deactivate from the menu. Click OK on the confirmation pop-up that appears. Please note that deactivated groups will still appear for Administrators in this module only. When creating a new meeting, deactivated attendee groups will not appear.