Even if a college is accredited, that doesn't mean anything. You best bet would be to contact a 4 year college and pretend you have the degree already and what would transfer in. NAU will not transfer in well, it is like the Globe School of Business up here and many others, they aren't real colleges. If you look in the "about us" section that is the first hint, the guy is the president and CEO. Colleges don't have CEO's.
Your best bet would be a local community college or one of the true online universities. One of the biggest is Phoenix University. It looks like Metro doesn't have a full IT program, but they do have a few computer related fields. I am not sure if they are available solely online though.
http://www.metrostate.edu/catalog/index.cfm