You say "Be that as it may" when you
want to move onto another
subject or go further with the discussion, without deciding whether what has just been said is
right or
wrong.
whether that is true or not, or regardless of the accuracy or correctness of that, used to indicate that some
statement,
action, etc., is perhaps true or correct from a certain
point of view, but not from another, or that there are additional
factors to take into
account.