The function keys can be activated in the session by pressing additionally the FN key (for example, FN+F1). To perform actions that use the Command button on the Mac, you will need to use the control button in Windows (for example Copy = Ctrl+C). The Command key on the Mac keyboard equals the Windows key. The remote session maps your keyboard to the best matching keyboard language available on the remote PC. Some of these are Mac specific layouts or custom layouts for which an exact match may not be available on the version of Windows you are remoting into.
There are many types of Mac keyboard layouts. Mac keyboard layouts differ from the Windows keyboard layouts.