Classes should not show up in the address book
A few clarifying points / questions about class membership and the address book:
1. Classes today have hidden membership (you have to be a member of the class to see other members in the class).
2. An email to the class alias will be rejected if you are not also a member of the class.
Are there other specific scenarios that customers are trying to block by hiding the Class (class name and alias) from being listed in the address book?
Paula Yohe commented
It clogs up the Address book -- it becomes unwieldy. We have removed them from the address book. There are hundreds of classes