/mcpFor More Information Task Cisco Unified Communications Operating System Administration allows the system administrator to select the distribution type, when generating a CSR for the individual certificate purposes that supports the multi-server option. The system automatically populates the CSR with the required SAN entries and displays the default SAN entries on the screen. On generating a multi-server CSR, the system automatically distributes that CSR to all the required servers in the cluster. Similarly, on upload of a multi-server CA signed certificate, the system automatically distributes that certificate to all the required servers in the cluster Login to Cisco Unified Communications Operating System Administration window. Step 1 See the Generating a Certificate Signing Request. Generate a CSR on the server. Step 2 See the Downloading a Certificate Signing Request. Download the CSR to your PC. Step 3 Get information about obtaining application certificates from your CA. See Third-Party CA Certificates for additional notes. Use the CSR to obtain an application certificate from a CA. Step 4 Get information about obtaining a root certificate from your CA. See Third-Party CA Certificates for additional notes. Obtain the CA root certificate. Step 5 See the Upload Trust Certificate. Upload the CA root certificate to the server. Step 6 See the Upload Application Certificate. Upload the application certificate to the server. Step 7 Cisco Unified Communications Operating System Administration Guide for Cisco Unity Connection Release 15 27 Security Single-server and Multi-server Certificates Overview