Which of the following services must be restarted in Cisco Unity Connection Serviceability once you configure the SMTP server?

Connection Conversation Manager is the core service responsible for processing calls, managing voicemail delivery, and sending notifications including email alerts. Because it reads SMTP configuration at startup, any change to the SMTP server settings requires a restart of this service before the new configuration takes effect.

Connection Mixer handles audio mixing and transcoding for voice messages and is not involved in SMTP or email notification processing.

Connection SNMP Agent manages SNMP-based monitoring and alerting, which is unrelated to SMTP mail server configuration.

Connection Administration is the web-based administrative interface process and does not handle outbound email or voicemail notification delivery.

A service restart is required because Connection Conversation Manager caches the SMTP configuration at startup and will not pick up changes dynamically.