All this could boil down to:

"To my knowledge, this is among the first document-borne AI-worm propagations through a productivity suite"

self-propagation

it's useless, "worm" already implies that

normal workflows

this implies there is an abnormal workflow that already had this problem- which, as far as i know, didn't

mainstream commercial productivity suite

oh my fucking god, just say productivity suite, it never happened with non-mainstream or non-commercial suites either because guess what, NO ONE ADDED AIs IN TO THEM BEFORE, unless we consider shit like Notion or whatever "productivity suite" too but i doubt