Working in conjunction with the Cisco Certificate Authority Proxy Function (CAPF) application, the CAPF service can perform the following tasks, depending on your configuration:
Issue locally significant certificates to supported Cisco Unified IP Phone models.
Upgrade existing certificates on the phones.
Retrieve phone certificates for troubleshooting.
Delete locally significant certificates on the phone.
 Note | Cisco Unified Communications Manager only: When you view real-time information in the Real-Time Monitoring Tool (RTMT), the CAPF service displays only for the first server. |