0. Uninstall Intel Bluetooth Driver.
Bluetooth Audio Device does not work properly under Intel Bluetooth Driver when Windows Server is installed.
1. Install latest Toshiba Bluetooth Stack.
2. Set the driver manually.
During installation, Setup would fail to detect Bluetooth Device.
Then, right click on Unknown Device → Update Driver → Browse my computer for driver software → Let me pick from a list of device drivers on my computer → Choose USB Bluetooth Driver-2 (V2.1+EDR)
3. All done.
Audio output will come through the paired Bluetooth device.