designating a shares' "designated area"

I’m new to networked Drobos; my 5N should arrive in a couple of days.

The Drobo documentation that I’ve found says that I can create a share “Videos” which will have a desginated area… but how is this area designated?

Do I get a menu where I can specify things like space limits? I’ve found how to create users, and add them to the shares access list.

If a user forgets their Drobo 5N password, can the administrator reset the password?

When a user changes their Windows logon password, do they have to do anything about the passwords on their Drobo shares? I suspect not.

Do passwords on drobo shares expire?