tente isto:
AuthType Basic
AuthName "LDAP and file
AuthBasicProvider file ldap
AuthUserFile /path/to/htpassword/file
AuthLDAPBindDN <your bind dn>
AuthLDAPBindPassword <your password>
AuthLDAPURL "<your ldap url>"
AuthzLDAPAuthoritative off
Require valid-user
Satisfy any
Talvez você altere AuthBasicProvider file ldap
para AuthBasicProvider ldap file
, dependendo de onde deseja pesquisar primeiro.