Activation of the carboxylate group of 2,3-dihydroxy-benzoate (DHB), via ATP-dependent PPi exchange reactions, to the acyladenylate, preparing that molecule for the final stages of vibriobactin synthesis. 2,3-dihydroxybenzoate + ATP + holo-[aryl-carrier protein] = 2,3-dihydroxybenzoyl-[aryl-carrier protein] + AMP + diphosphate Siderophore biosynthesis; vibriobactin biosynthesis. Belongs to the ATP-dependent AMP-binding enzyme family.