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
Answer: B