If Unity Connection server is being shared by N (N=2, 3, 4….) tenants for voicemail service, each tenant can be setup as a separate "tenant" that is effectively isolated from other tenant hosted on the same server. Hence, a tenant entity refers to logical group of resources in Unity Connection assigned to a single company, where each tenant is assigned with only one partition, search space, and phone system.
Tenant partitioning also introduces the concept of using the corporate email addresses as their alias, which enables alias uniqueness across tenants. In addition, separate Unity Connection SMTP domain is provided for each tenant.