Hi Jean,
Thanks for using Syncfusion product.
As of now we don’t have any direct support to disable the copy and paste option .If we want to disable copy, paste or any context menu items, we need to customize the default Context menu .Please refer the below KB article for more details about customizing default context menu.
KB Link: http://www.syncfusion.com/kb/2686/how-to-customize-the-context-menu-in-sfschedule
Please let us know if you have any concerns.
Regards
Vigneshkumar R.