The ScheduleView control is designed to use its own scroll bars and not to be placed inside a ScrollViewer control. Because of this it might have glitches when placed in ScrollViewer and the main drawback is that all virtualized panels will stop working and all visual items will be realized when the ScheduleView control is loaded. This might cause performance issues.
Could you please give us some details why you need to place the control in a ScrollViewer control? This will help us better understand the need of placing the RadScheduleView control in ScrollViewer.
All the best,
the Telerik team