Easy answer would be to try it. I strongly doubt you would damage anything, unless you tried to force the connector in if it was incompatible or something. When you plug Onkyo's microphone in, the receiver/onscreen setup screen automatically goes to the calibration menu, so I'm not sure if that would happen with any microphone with a miniplug connector, or if there's something proprietary about Onkyo's microphone.
Try it and let us know.
Two things are infinite: the universe and human stupidity. And I'm not sure about the universe. -- Albert Einstein