What is the purpose of the IP Office Server Edition Secondary Server?

The Secondary Server in IP Office Server Edition is designed to act as a failover for the Primary Server (Option B), ensuring resilience. If the Primary Server fails, the Secondary takes over call processing and management, maintaining service continuity. Option A is incorrect as capacity is expanded via Expansion Systems, not the Secondary Server. Option C is false because voicemail is typically handled by Voicemail Pro, which can run on either server or a separate system. Option D is incorrect as SIP trunking is managed by the Primary Server or Expansion Systems, not specifically the Secondary Server.References: Avaya IP Office Server Edition Resilience Configuration Guide.