How do I get info about users, forwarders and their mailboxes on SBS 2011

Is there a way to get a report of sorts on an SBS 2011 Standard system that would show these fields?

Username
If the account is disabled or not
Who if anyone it's set up to forward incoming mail to
The size of the mailbox?

We've set up new users over time and the old users we'll either disable or change password, then in Exchange, set mail to forward to the new person.

The boss is looking to clean things up. Most likely delete old users, but also maybe change who is getting former users mail, see what mailboxes are getting unweildy, et al.

I can build the first items manually going into each user, but would like a simpler process and don't know how to get the last item - mailbox size.

any advice would be appreciated.