I am a Dropbox Business user with a company of ONE. I work freelance with a boat load of other people who are also freelance. I am a part of several projects a year and need to share folders with a new group of 30-100 people every few weeks - all of which are outside my organization since, as I mentioned, we're all freelancing individuals. As the shared folder owner, I often need to message everyone who has access to that folder. It is extremely tedious to look up and type in the email of each individual person. I would greatly benefit from a 'message everyone with access' to a shared folder feature.