A collaboration engineer is troubleshooting Cisco IM and Presence high availability. The system is version 10.x. The engineer has confirnæd that the server recovery manager service is configured using system defaults. The engineer notices that user sessions have not fallen back to the homed nodes. What is the cause this Issue?

In Cisco IM and Presence version 10.x, the default configuration for a high-availability redundancy group is Manual Fallback. This means that after a failed node recovers and becomes active, the system will not automatically move users back to their primary (homed) node. An administrator must explicitly initiate this process by navigating to the Redundancy Group configuration in Cisco Unified CM Administration and clicking the "Fallback" button. Since the system is configured with defaults, the user sessions remain on the backup node because this required manual action has not been performed.

B. The user accounts were moved to the redundant server. This describes the normal and expected behavior of a failover event; it is the result of the failure, not the cause of the subsequent fallback issue.
C. The failed service Of server was offline longer than the Client Re-Login upper Lint setting. This client-side timer determines how long a client attempts to reconnect before its session is terminated. It does not control the server-side Server Recovery Manager (SRM) fallback mechanism.
D. The failed service or server has not been active for at least 30 minutes. This refers to the "Server Recovery Delay" timer, which ensures a node is stable before allowing fallback. While this can delay the process, the root cause of a complete lack of automatic fallback is the manual default setting.

1. Cisco Unified Communications Manager and IM and Presence Service

System Configuration Guide

Release 10.5(2)

Chapter: Configure IM and Presence Service High Availability

Section: Configure Redundancy Groups

Quote: "By default

the IM and Presence Service is configured for manual fallback. You must manually initiate a fallback of users from the backup IM and Presence Service node to the home node after the home node recovers." This directly supports that manual intervention (clicking the Fallback button) is required with default settings.

2. Cisco Unified Communications Manager and IM and Presence Service

Administration Guide

Release 10.5(2)

Chapter: Configure IM and Presence Service High Availability

Section: Fallback of IM and Presence Service Nodes

Quote: "To manually initiate a fallback of users from the backup node to the home node

click Fallback." This specifies the exact action described in the correct answer. It also details the "Server Recovery Delay" timer

confirming its default is 30 minutes

which explains why option D is a temporary condition

not the root cause.