In contrast to a simple GroupWise system, a typical GroupWise system is installed on multiple servers, perhaps across multiple geographic locations.
Primary Domain: The primary domain would be created on its own server and would not own post offices.
Secondary Domains: Secondary domains would each be created on their own servers and would own multiple post offices.
Post Offices: Depending on server capacity, post offices could be created on domain servers or could be created on their own servers.
Internet Agents: One or more Internet Agents would be set up for the GroupWise system. An Internet Agent could be set up in a domain that owns post offices, or a separate domain could be created specifically to house one or more Internet Agents.