The HTTP Basic Authentication method for the PingAccess Administrative Console supports only a single administrator account. This method is configured by defining a single username and password (or password hash) within the run.properties configuration file. It is intended for initial setup, emergency access, or simple deployments where a single administrator is sufficient. For environments requiring multiple distinct administrator accounts with features like Single Sign-On (SSO), PingAccess must be configured to use an external OpenID Connect (OIDC) Provider, such as PingFederate.

A. 1000: This is incorrect. The HTTP Basic method is not designed for managing multiple users and has no capacity for this scale.

C. 10: This is incorrect. The configuration parameters in run.properties only allow for the definition of one username and password pair.

D. 100: This is incorrect. The built-in HTTP Basic authentication mechanism does not support multiple accounts.

1. Ping Identity PingAccess 7.3 Documentation, "Configuring administrative authentication," Section: "Configure HTTP Basic administrative authentication." The documentation details the configuration using the singular properties pa.admin.username and pa.admin.password in the /conf/run.properties file, which demonstrates that only one set of credentials can be defined.

2. Ping Identity PingAccess 7.3 Documentation, "Configuring administrative authentication," Section: "Configure single sign-on for administrative authentication." This section explicitly states that to support multiple administrators, an external identity provider using OpenID Connect (like PingFederate) should be configured, reinforcing that the built-in HTTP Basic method is not intended for this purpose.