What is the difference between winbind idmap backends?

One of the core components of winbind is UID/GID mapping, important consideration should be taken when integrating winbind with Active Directory to determine which ID mapping backend will be utilized in your environment. There is an exception where the idmap_sss module is used in which case the System Security Services Daemon (SSSD) takes ownership of the UID/GID mapping and winbind i...