I can't imagine anyone pronouncing it "acc-use-a-tory".
Try actually saying that. You end up having to pause after the "acc" in order to properly pronounce the "use" part.
Throwing my hat in with the "a-cues-a-tory" group.
I would use "acc-u-zate-ory".
I think it's one of those words where both pronunciations are acceptable though.
