I have a question about email logins and case sensitivity.  If you configure sssd to allow logins by email, can you set it up to be case insensitive yet still require normal account logins to be case sensitive?  We want to allow users to authenticate with their email address or their account name but we can't set up "case_sensitive = false" due to some issues with some applications that treat "username" differently from "UserName" (for example).  How have others managed this?