The sssd.conf file is the configuration file for the System Security Services Daemon (SSSD). SSSD provides access to different identity and authentication providers. The configuration file typically contains multiple sections, but the [sssd] section is always present. This section provides global options that apply to all other sections of the file.
Example:
[sssd] config_file_version = 2 services = nss, pam domains = LDAP
Reference:
SSSD Configuration
SSSD Man Pages