The term is used a lot in judgments. It usually means that there is a factual piece of information you are referring to as the subject. Now this information can either be accepted by you of denied. It may even change your opinion on the case matter as whole. But when you are using this phrase "be it as it may", you are expressing that you are accepting that information, at least for now. Also, you are making it clear that you won't be prejudiced because of the information and will continue to judge in an impartial manner.