/mcpError Message %UC_ICSA-2-ICSACertificateValidationFailure: %[SubjectCN=String][IssuerCN=String] [ErrorCode=String][AppID=String][ClusterID=String][NodeID=String]: Cisco Intercluster Sync Agent service detected a validation error on the certificate being processed. Explanation Cisco Intercluster Sync Agent service detected a validation error on the certificate being processed Recommended Action Use the IM and Presence Service Platform GUI to compare the certificates loaded on this server with the certificates on the source server. It may necessary to delete the problem certificates and reload them Error Message %UC_ICSA-4-ICSACertificateCAConflict: %[SubjectCN=String][IssuerCN=String][AppID=String] [ClusterID=String][NodeID=String]: Cisco Intercluster Sync Agent service detected a CA certificate conflict Explanation Cisco Intercluster Sync Agent service detected a CA certificate conflict Recommended Action A conflicting CA certificate was detected on CUCM when auditing certificates. Stop the Cisco Intercluster Sync Agent on all IM and Presence nodes in the cluster. Delete the conflicting certificate on all CUCM and IM and Presence nodes and re-upload the valid certificate to each node. Start the Cisco Intercluster Sync Agent Error Message %UC_ICSA-2-InterClusterSyncAgentPeerSyncFailure: %[remotePeerAddress=String][AppID=String] [ClusterID=String][NodeID=String]: Cisco Intercluster Sync Agent service detected periodic sync failure Explanation Cisco Intercluster Sync Agent is unable to read the remote peer's hostname or IP address of the IM and Presence node. The service will try resyncing every 5 minutes. Recommended Action Verify that the hostname or IP address of the IM and Presence node is present in System -> Server configuration page on remote cluster's Cisco Unified CM Administration. Error Message %UC_ICSA-2-InterClusterSyncAgentDomainConflict: %[remotePeerAddress=String][AppID=String] [ClusterID=String][NodeID=String]: Cisco Intercluster Sync Agent service detected periodic sync failure Explanation Cisco Intercluster Sync Agent detected proxy domains mismatch. The service will try resyncing every 30 minutes Recommended Action Cisco Intercluster Sync Agent detected proxy domains mismatch. The service will try resyncing every 30 minutes 5/24/26, 3:34 AM System Error Messages for Cisco Unified Communications Manager 15 - Cisco https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/err_msgs/15_x/ccmalarms15.html 125/343