Genesys Cloud enables users to modify operating schedule groups through the Admin interface by navigating to Menu > Orchestration > Routing > Operating Schedules and selecting the Schedule Groups tab. Users with appropriate Routing > Schedule Group permissions (Add, Edit, View, Delete) can update group names, modify open and closed operating schedules, and adjust time zone assignments. The update process involves selecting the desired schedule group entry link in the Name column, making the necessary changes, and clicking Save. Individual operating schedules within groups can also be edited directly by clicking the specific schedule link entry. This functionality supports routing configuration management within Genesys Cloud's orchestration framework.