Hallo Francis,have you tried removing the account from your ldap? If dovecot has no information about a particular user, it won't replicate.Then you would have to delete the mailbox (on both cluster nodes) from the filesystem (rm -rf /path/to/mailbox)During testing you could move the mailbox somewhere else instead of deleting it, just in case something does not work as expected.Deleting files on another server could be automated with ssh (ssh keys).