I'm trying to give a few users the right to manage lists. Add new lists, remove them, add users and remove them, etc.

I see that there's a group called zimbradladmins that has privileges for list management. I added admin rights to the user and added that group in the box below.

I can log into the admin console with that user and see existing lists, I can click on the new list button but when I enter the list name, the only active button is Cancel. Next and Finish are greyed out.

Is there additional rights required? If so which ones?

We're using Zimbra 8.