I go to Texas A&M U. – Commerce. It's Texas State University (so it's legit) that has a 100% online MBA, and I believe you can focus on accounting. I don't know what your state requires for the CPA exam, but they are worth checking out.

http://www.pmi.org/CareerDevelopment/Pages/Our-Credentials.aspx#pmp

Remember, too, that many campus colleges and universities are coming online for higher education beyond the more standard Masters programs. And, these, you would be familiar with. However, you must ask them about their philosophy of online education, and dig deep into those attitudes. If their representatives want to be brief, then you know this is not a good one. They should have developed an understandable, concrete set of concepts that found their thinking about the nature of both classroom learning and online learning, and they should be able to distinguish between the two. I have both taught and taken both types of classes in English (no small feat either way), and I have found there are definite advantages to online teaching that can produce deep learning, life learning where that might not have happened to the same person in a classroom because of the particular type of learner that student is. (did that make sense?)

And, let me add here, that I would never recommend University of Phoenix even though they have the right pieces of paper. They definitely do not have the right educational philosophies that produce substantive learning. For them, it boils down to their belief that students don't want to learn anything beyond what is required for a piece of paper that gets them a raise and/or a promotion. There is nothing wrong with a student's focusing on that while getting a degree in whatever subject, but it is definitely wrong for a professional educator to have this attitude because it will put limits on the nature of the curriculum in such a way that a key goes missing in the educational process that opens the door to having passion for your subject matter which, in turn, is the dynamic that compels deep learning, life learning. And, we all know that life learning is what makes a good employee because it makes a good human being. Textbook learning will not do this for and with a student. I tell my students at the start of each semester that I can teach them nothing, but they can learn from me. And, when I am saying this, I am pointing to my passion about teaching what I am teaching them. At the end of each semester one and even two come to me on the last day of class and refer to my statement, saying they did not understand what I meant when I said that, but after a few weeks, when they had connected with the broader principles that my daily teaching was pointing at, they suddenly had "gotten it". Of course, I already have usually been aware of those two students because I have already seen the light bulbs going off in their heads during classroom. Just the other day, a really young student suddenly laughed out loud, saying "That's really cool!" That was a light bulb exploding in front of his intellectual and spiritual eyes about what I had just spent an hour and a half building to conclusion. And, that is what I mean when I say that leaving out of the educational formula the passion for what I teach will ruin teaching through standardization. With your question I am pointing to what is referred to as the diploma mills, and there are too many of them out there. So, be careful.

If you wanna do MBA online then go for accreditted and well reputable universities like:

1. euro mba
2. abathcus university, canada
3. penn state univ, usa
4. michigan state univ
5. open univ, uk
6. florida state univ, usa

best of luck