src/mongo/util/net/ssl_manager_windows.cpp:
cred->grbitEnabledProtocols = supportedProtocols;
if (supportedProtocols == 0) {
return

{ErrorCodes::InvalidSSLConfiguration, "All supported TLS protocols have been disabled."}

;
}

src/mongo/util/net/ssl_manager_apple.cpp
if (!tls10 && !tls11 && !tls12) {
return

{ErrorCodes::InvalidSSLConfiguration, "All valid TLS modes disabled"}

;
}

src/mongo/util/net/ssl_manager_openssl.cpp does not seem to have this check