Antonyms for the phrase "are apprised of" would include "are unaware of," "are ignorant of," "are uninformed of," and "are oblivious to." When someone is apprised of something, they are being informed or made aware of a certain situation or piece of information. However, in contrast, being unaware, ignorant, uninformed, or oblivious suggests a lack of knowledge or understanding. Therefore, it is important to stay informed and seek out information to avoid being described with these antonyms. It is vital for individuals, especially those in leadership positions, to ensure that their team members are not left in the dark and are apprised of the necessary information.