>"only people who have the link AND a google account for your company"
I'm not on my work computer, but I can't remember there ever being an option for only let people with a company google account see this. If that was the case, why wouldn't that just be on by default (which I would argue is everyone's expected behavior on corporate google drive).
At least for me, the default sharing option is only "specific people" named as being able to view it can view it. (Though, by default, they can also add other people.) Having the link is irrelevant.
I'm not on my work computer, but I can't remember there ever being an option for only let people with a company google account see this. If that was the case, why wouldn't that just be on by default (which I would argue is everyone's expected behavior on corporate google drive).