Share File - with all

Our organization has all users authenticate via active directory. I would like to share a file (word or power point) with any user who is member of organization. I am aware that I can share a file with particular users since i would know their email or their names but what about this scenario. What if I want to share URL to a file on SeaDrive but make it only visible to members who will need to log into SeaDrive to view it?