Currently most of my users are single mailboxusers. they don't share too much with each other.
But now, i might have a new customer who needs real workgroup facilities. It's a group with sub-groups that changes every now and then. So I wonder where i can read a good best-practices guide on how i should create the users, provide them with enough tools to be mostly self supporting and not loose them because it's too complicated.

Anyone who can point me in the right direction?

Thanks a lot,