To Use Dragon Dictate Remote Desktop, you have to connect your microphone to the USB connection on your computer. You need to Test it to make sure it works on the computer you're using. You must find a list of Nuance-approved microphones at the MacSpeech site. After that, open your remote desktop application via the desktop, the "Start" menu or the "Applications" menu. Then, Enable your microphone on the remote desktop application. Next, Test your microphone on your current computer as well to make sure the microphone does work. You should do this with opening a sound recording program on the computer, speaking and playing back the recording.
If the microphone does not work, you can resolve the issue before continuing. Forth, connect to your other desktop using your remote desktop application. You have to test the microphone at this point with opening a sound recording program on the remote desktop, speaking and playing back. After that, Launch Dragon Dictate on your remote desktop. Then, Open the word processing program you intend to use. Next, speak through your microphone.