What setting must be configured for a user to be automatically logged out after a specific time when they disconnect from Azure Virtual Desktop?

The correct setting for automatically logging out a user after a specific time when they disconnect from Azure Virtual Desktop is through Group Policy settings.

Group Policy settings allow administrators to enforce various configurations and controls over user sessions in a Windows environment. Specifically, the relevant policy for managing user logouts upon disconnection is the "Set time limit for disconnected sessions" setting. By configuring this policy, you can specify the duration after which a user's session is automatically terminated if they disconnect, thereby ensuring efficient use of resources and enhancing security by preventing unattended sessions from persisting indefinitely.

While session host properties and cloud management settings are important for broader management in Azure Virtual Desktop, they do not directly control session timeout behaviors related to user disconnections. Moreover, session timeout rules may be related but are not as explicit or defined in the context of traditional Group Policy within Windows environments. Group Policy is the standard approach in environments leveraging Active Directory, thus making it the most applicable choice for this scenario.