Thanks to Root Access I was able to find the answer.
By default, Windows won't "Play To" any device that is not "Windows Certified".
Having said that, there is a pretty simply workaround that in my case worked flawlessly. I wanted to post the answer here to make it easy to find for future visitors.
Microsoft has posted the workaround on Microsoft Answers.
Essentially, you need to open the Registry Editor, either by using Windows Start Menu and searching for "registry editor", or by clicking WindowsKey+R and entering regedit
.
Go to the HKEY_LOCAL_MACHINE\Software\Microsoft
key and add a key named PlayTo
. Under this new key, add a 32-bit DWORD value named ShowNonCertifiedDevices
and set the value to 0x01
(hexadecimal). Restart your computer, and voila, the device is now visible from the XBox Music App.
I'd like to give props to @allquixotic for helping me find the workaround document in the chat here.