Mixed enterprise branch deployments support both Centralized users and IP Office users. Centralized users obtain telephony services from the Avaya Aura® Communication Manager Feature or Evolution Serve in the enterprise core, and IP Office users obtain telephony services from the local IP Office. As a result, when the Mixed enterprise branch is deployed, the IT department should identify and record which telephones are associated with a Centralized user experience and which telephones are associated with an IP Office user experience.