I just upgraded my account in order to have unlimited external collaborators, but the problem is I cannot add even a single user from my company as managed user (I have 3 seats, 2 empty at the time).
There is no button "add user" as described, there is no place to add the e-mail adress, nothing.
We need this to work fast and now and I have no possibility even to activate this account properly to serve it purpose.