Note: This guide will work for Windows 2012 R2 and Windows 2016 instances.
Windows Servers, by default, do not have the "Windows Audio" service enabled.
First, RDP into your Windows instance.
Then, open the "Run" window by pressing WIN + R and enter the following:
Next, find the service labeled "Windows Audio", and double click on it.
The Windows audio properties dialog will popup. Find the "Startup type" dropdown, and select "Automatic".
Under the "Service status" section, click the start button to start the service.
That's it! You have now enabled Windows Audio and it will startup every time the server restarts.