RDP uses a virtual display driver rather than fglrx, and that is likely why ADL is failing. It's not a problem per se, you just won't see temps or get fan control.
The biggest question is why are you using Windows? Why not use Linux if you have a headless server dedicated to brute force?
The biggest question is why are you using Windows? Why not use Linux if you have a headless server dedicated to brute force?