For manual SIP configuration of the Avaya Workplace client, the "Phone Service" section requires two fundamental parameters to establish a connection with the Avaya Aura® infrastructure. The Server Address is the FQDN or IP address of the SIP registrar, which is typically the Avaya Aura® Session Manager. The Domain is the SIP domain that the client belongs to, which is essential for proper call routing and user identification within the Aura® environment. These two fields are mandatory for the client to successfully locate and register its phone service.

B. Feature Server Address: This is used for supplementary services like presence or advanced collaboration features and is not required for basic phone service registration and operation.

C. Password: The password is a user-specific credential that is entered in the "User Credentials" section of the configuration, not within the "Phone Service" section which defines the server infrastructure.

1. Avaya Aura® Communication Manager Documentation Library, "Administering Avaya Workplace Client for Windows, Release 3.25" (NN42700-625), June 2022.

Page 51, Section: "Manually configuring accounts": This section explicitly lists the fields required for manual configuration. It states, "On the Accounts screen, in the Phone Service section, complete the following fields: Server: Type the FQDN or IP address of the Session Manager server. Domain: Type the SIP domain." This directly confirms that Server and Domain are the required fields in the specified section. The document then shows that Password is entered under a separate "User Credentials" heading.