[users@httpd] Username in the "Down-Level Logon Name" format

[httpd httpd]

Is there a way to get httpd to recognize a username in the Down-Level Logon
Name format?  E.g. DOMAIN\username.

I see explicit documentation about UPN at
https://httpd.apache.org/docs/current/mod/mod_authnz_ldap.html#activedirectory;
but nothing mentioning the down-level logon name format.