Which user role is restricted from accessing an application?

In the context of Appian user roles, the role that is restricted from accessing an application is the Deny role. The Deny role explicitly prevents users from accessing specific application functionalities or data, making it unique in the sense that its primary purpose is to impose restrictions.

Understanding how user roles function within Appian is crucial. The Administrator role typically has the highest level of access, allowing users to manage applications and resources effectively. The Editor role can modify application components, while the Viewer role is designed for users who can view content but not make any changes. None of these roles issue a restriction on accessing the application like the Deny role does, which is specifically designed to limit access rights for certain users or groups.

Thus, the Deny role stands out as the only option that inherently restricts access, focusing on subtraction of permission rather than an enhancement of capabilities. This understanding of role functionalities allows for better management of user access and ensures that sensitive information is safeguarded from unauthorized users in an Appian environment.