Which action is a valid fallback when a client certificate is unavailable during SMTP authentication on Cisco ESA?
A. LDAP Query
B. SMTP AUTH
C. SMTP TLS
D. LDAP BIND
Which action is a valid fallback when a client certificate is unavailable during SMTP authentication on Cisco ESA?
A. LDAP Query
B. SMTP AUTH
C. SMTP TLS
D. LDAP BIND