Hmmm the first thing that comes to my mind is the Billing Accounts, so you can bill different departments for the amount of space they used.
So for instance you may have several different departments, Marketing, Sales, IT etc.
You then in EV set the billing account to be maybe the head of each department, so lets say you have Marketing department that has UserA, UserB and UserC and they bill to Mr Marketing Manager.
You then go to http://yourEVServer/EnterpriseVault/Usage.asp and you have a link there for Usage By Billing Account
You will then see several Billing Accounts such as
Mr Marketing Manager
Mr IT Manager
Ms Sales Manager
And next to each it will show how much space is being used, so you could say that Marketing is taking up 2TB more data than anyone else, so you charge them internally for the space that they are using
By default the Billing Account is set to the user that owns the mailbox, so when you view a default EV installation you usually have one billing account per user, but in a proper set up you may only see a handful of accounts etc
https://www.linkedin.com/in/alex-allen-turl-07370146
