Hi,
you have to re configure your /opt/zimbra/conf/nginx/template/nginx.conf.web.template the section
upstream ${web.upstream.name}
{
Index of /
#
http://your.server2.org:8080
#${web.upstream.:servers}
zmauth;
}
And restart nginx before you stop a mailbox server.
You can do it in LDAP as well but I do not know how from top of my head.
Cheers
Markus
But remember your mailboxes on the hashed out boxes will be gone.