/mcpError Message %UC_ICSA-2-InterclusterSyncAgentPeerDown: %[remotePeer=String][AppID=String] [ClusterID=String][NodeID=String]: Cisco Intercluster Sync Agent service has detected an Intercluster Peer is unreachable Explanation Cisco Intercluster Sync Agent service detected remotePeer is unreachable via ping on TCP port 8443. Recommended Action Verify the node remotePeer is up and the network connectivity from this node to remotePeer is reachable Error Message %UC_ICSA-2-MAencryptionMultiMaster: %[remotePeerAddress=String][AppID=String] [ClusterID=String][NodeID=String]: Cisco Intercluster Sync Agent detected multi-master configuration Explanation An ICSA Peer cluster is configured for encrypted message archiving with a different master from the local cluster. Recommended Action Encrypted message archiving requires a single master cluster for all ICSA peers. To resolve this condition you must download the encryption key from the remote cluster and disable encrypted message archiving before adding the remote cluster(s) as ICSA Peers with this cluster. Error Message %UC_ICSA-3-InterClusterSyncAgentAppUserEndUserConflict: %[remotePeerAddress=String] [conflictingUserID=String][AppID=String][ClusterID=String][NodeID=String]: Cisco Intercluster Sync Agent service detected an End User on a peer cluster with a User ID that conflicts with an existing local Application User. Explanation The peer End User with the conflicting User ID cannot be synced to this cluster because an Application User with the same User ID exists. Recommended Action Rename the local Application User to allow the remote End User to be synced to this cluster. Error Message %UC_null-2-LocationServiceMseDown: %[hostname=String][AppID=String][ClusterID=String] [NodeID=String]: Cisco Location Service MSE Down Alarm. Explanation MSE is down. Location services for this MSE will be unavailable. Recommended Action Check IM/P Service logs and MSE logs to determine problem. After resolving issue, delete and re-add the MSE. Error Message %UC_ReplWatcher-4-ReplicationFailure: %[HostName=String][AppID=String][ClusterID=String] [NodeID=String]: Cisco IM and Presence Data Monitor detected replication failure. Explanation Cisco IM and Presence Data Monitor has detected database replication failure on this node. If this node is currently starting, some services will be prevented from starting until replication is established. Recommended Action Please check Cisco IM and Presence Data Monitor logs for details. Replication status can be manually checked via the command line interface. 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 127/343