/mcpDescription Field Select a Unified Communications Manager server. When you select this field for multiserver for ECDSA, the syntax is: Callmanager-ecdsa common name: <host-name>-EC-ms.<domain> When you select this field for multiserver for RSA, the syntax is: Callmanager common name: <host-name>-ms.<domain> Distribution Important Supported from Release 14SU1 onwards. Displays the common name or the common name appended with the serial number of the certificate. Common Name or Common Name_SerialNumber is the file name of the certificate. Shows the name of the Unified Communications Manager application that you selected in the Distribution field by default. Common Name / Common Name_SerialNumber Important Supported from Release 14SU1 onwards. By default, the Organization Unit field is removed from the Certificate Signing Request. Choose this option to include the Organization Unit field in the Certificate Signing Request. Note If the Certificate Signing Request has an Organization Unit and the signed CA certificate does not, you can upload the signed CA certificate to Unified Communications Manager. Include OU in CSR This field appears in Subject Alternate Names (SANs) section. It lists the host names that are to be protected by a single certificate. Auto-populated Domains This field appears in Subject Alternate Names (SANs) section. It shows the default domain name. You can modify the domain name, if required. Parent Domain This field identifies the type of key used for encryption and decryption for the public-private key pair. Unified Communications Manager supports EC and RSA key types. Key Type Security Guide for Cisco Unified Communications Manager, Release 15 and SUs 50 Basic System Security Certificate Signing Request Fields