There is a couple of drain tubes that drain the water away, you can see these if you open the sunroof but if the sunroof is out of adjustment it can be hard to close it again, the adjustments are very important for the roof to work correctly, if the tubes are blocked the water will not drain away, compressed air will clear the tubes, another way is to tilt the roof open then close it again and you might have to thump the roof close gently if its out of adjustment just until its in line with the rest of the roof, i had to do this on my old 360 due to lack of parts then.
John, March 2007