You need to talk to your school(s). I know of one student who was in a dual degree JD/MBA program who quit law school after one year. The student decided to finish the MBA part of the dual degree and was able to still get some of the law school credits to count towards the MBA.
It all depends on the school(s) and I wouldn't bank on having anything count towards a Master's degree until you ask the right people at your school(s).