One of my friends controls hundreds of Macs for a school. They have Lion.
The 6th grade Macs have the 6th grade accounts (~100), the 7th grade Macs have the 7th grade accounts (~120) and the 8th grade Macs have the 8th grade accounts (~90). There are also some staff accounts.
He doesn't have all the users on all the Macs; I believe that he has them set up to grab the profiles from a server - thus, a user's desktop on one computer is synced with that user's desktop on another computer.
I'm wondering whether or not it's possible to put all ~400 users on each computer so that the grades can use each others' Macs interchangeably. Is it possible to put this many users on a Mac? And how many of these can be logged in at the same time?