This can be used if your directory service is only hosting a single domain (like example.com) and you'd like to allow your users to log in to LogScale with their username and not domain name (such as john rather than john@example.com). If so, set this to the common domain name for all users (like example.com in this case).

While this makes use of the domain name optional, you can still add domain when logging in, as long as it matches.

See LDAP_AUTH_PROVIDER_URL for an example.