It's not an Xbox problem, it's a Win10 problem. It doesn't connect to the XOne through the Cast to unless you go through the Movies and TV app first. After that the Right click menu will work. It's something related to device initiation. It doesn't even
TRY connecting if you haven't gone through Movies and TV once.
And I found someone else who had the same thing happen also using a laptop only trying to cast to a TV.
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