A collaboration engineer restored a failed primary node of an active/standby IM and presence subcluster with the server Recovery manager set to defaults. The engineer notices that the user is still assigned to the secondary server. Which action resolves this issue?
A. Select the Fallback button under Presence Redundancy Group Configuration
B. Wait for 30 minutes for automatic fallback to occur
C. Modify the DNS SRV records to point back to the primary server
D. Restart the services on the primary server
A is correct
Problem is, that the question say the server recovery manager is in default!, you need to activate the automatic fallback after x-minutes
https://www.cisco.com/c/en/us/support/docs/unified-communications/unified-communications-manager-im-presence-service/200958-IM-and-Presence-Server-High-Availability.html