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You must restart the Unified CCX server. In the case of high availability deployments, restart both the nodes. Note Related Topics Regenerate Certificate Regenerate Certificate To regenerate a certificate, follow this procedure: Regenerating a certificate can affect your system operations. Caution For certificate regeneration, the supported key lengths are restricted to 1024, 2048, 3072, and 4096. Step 1 Navigate to Security > Certificate Management. The Certificate List window appears. Step 2 Click Generate Self-signed. The Generate New Self-signed Certificate dialog box opens. Step 3 Choose a certificate name from the Certificate Purpose list. The following table contains descriptions of the certificate names that appear: Description Name This self-signed root certificate is generated during installation for the HTTPS server. tomcat This self-signed root certificate is generated during installation for IPSec connections with MGCP and H.323 gateways. ipsec Step 4 Click Generate. Step 5 After you regenerate a certificate, you must restart the Unified CCX server. In the case of high availability deployments, restart both the nodes. What to do next After you regenerate a certificate in Cisco Unified Operating System, you must perform a backup so that the latest backup contains the regenerated certificates. For information on performing a backup, see the Cisco Unified Contact Center Express System Administration Guide. Upload Certificate to Server Uploading a new certificate can affect your system operations. After you upload a new certificate, you must restart the Unified CCX server (in the case of high availability deployments, restart both nodes). Caution Cisco Unified Operating System Administration Guide for Cisco Unified CCX and Cisco Unified IP IVR, Release 12.5(1) SU3 23 Security Regenerate Certificate