For security purposes, a Horizon administrator can set timeouts that log you off a server and lock a published application after some period of inactivity.

By default, you must log in again if you have Horizon Client open and are connected to a particular server for more than 10 hours. This timeout applies to both remote desktop and published application connections. You receive a warning prompt 30 seconds before a published application is locked automatically. If you do not respond, the published application is locked. By default, the timeout occurs after 15 minutes of inactivity, but a Horizon administrator can change the timeout period. For example, if you have one or more published applications open and you walk away from your computer, the published application windows might no longer be open when you return an hour later. Instead, you might see a dialog box that prompts you to click OK to re-authenticate to the server so that the published applications windows appear again.

You can configure the warning to be displayed before a user is forcibly disconnected and set the timer at which the warning is displayed. You can also configure the message that is displayed when the user is forcibly disconnected.

To configure these timeout settings in Horizon Console, select Settings > Global Settings, click the General Settings tab, and click Edit.

On a Chromebook or an Android device in DeX desktop mode, if you navigate to the desktop and application selector window and one or more published application sessions are disconnected, Horizon Client prompts you to reconnect to the sessions. You can click Reconnect to applications to open the published application sessions, or click Not now to close the message. You can also select a check box not to show the message again.