I'm confused by the lingo, do you mean multiple domain logins, such as what I have:
https://webmail.bentlyenterprises.com

Or do you mean actual management of, say, all the users on an LDAP system that have an account on a pop/imap server? Roundcube is a web application that works like a desktop mail application, so it doesn't have any other advanced features for server other than what you would normally have in your desktop client.

Alexander Fernandez wrote:

Horde previously had a feature where the main cPanel account holder could login and view all the domain users’ mailboxes. Since then, I have not been able to find another web client that has this. Is this something that Roundcube can manage as we have a customer that needs this functionality?

Thank you,

Alexander Fernandez