Ah, that should work. I'll get it fixed Monday.
Mailbox accounts should now see a "Labs" menu, and have access to the "Send A Fax" tool. For the time being, their fax history is shared with the master account, so you will see the same fax history under both the mailbox and master accounts.
I love this place.
So non-master users can no longer view their OWN fax history, apparently. That's unfortunate. But I see the current provision allows only a single history, thus, to keep the master's history private the secondary accounts cannot see any history at all. Right? Well, hopefully this is updated in the future. Would be quite nice.