Where do you verify that SmartDirectory is enabled?

Where do you verify that SmartDirectory is enabled?

A.
Global properties > Authentication> Use SmartDirectory(LDAP) for Security Gateways is checked

B.
Gateway properties > Smart Directory (LDAP) > Use SmartDirectory(LDAP) for Security Gateways is checked

C.
Gateway properties > Authentication> Use SmartDirectory(LDAP) for Security Gateways is checked

D.
Global properties > Smart Directory (LDAP) > Use SmartDirectory(LDAP) for Security Gateways is checked