This article describes how to enable the System Beep on Windows Server 2008R2 so that it works for ICA and RDP Sessions.
You must be an administrator on the server where you want to enable this feature.
Some legacy applications still want to use the System Beep as audible notification for events. The System Beep is no longer working by default with Windows Server 2008 R2.
Install the Desktop Experience server feature.
Configure the Windows Audio service to start automatically.
Configure the Beep service to start automatically:
sc config beep start= auto
Enable the SystemSoundsService task to run on user logon.
Open the Task Scheduler.
Go to the Task Library.
Navigate to Microsoft/Windows/Multimedia.
Right-click the SystemSoundsService task and click Enable.