I add a account to the zimbradladmins@... distribution list and set the administrator field for the account. After that, I can login to the admin interface with this account an see the Distribution Lists panel. But the new button at the toolbar is missing, see screenshot.
The View Rights tab of the zimbradladmins@... shows under Domains as Granted Rights "createAlias, createDistributionList, deleteAlias".
How I get the new button?