On the admin account I have created aliases of postmaster@ and abuse@ for all the domains on our server. Today I was attempting to create identities on this account so when responding to an email to one of these aliases it would use the address that the email was sent to. I ran into a pretty big problem though.
After the 20th identity (including the default one) I get the error "The Identity could not be created because you have exceeded your identity quota". It's great that there is a quota that sets the maximum number of identities...but I can't find anything in the admin UI relating to this number.

Anybody have an idea as to how I can change this?