When multi-session mode is activated for a published application, you can use multiple sessions of the same published application when you log in to the server from different client devices.

For example, if you open a published application in multi-session mode on client A, and then open the same published application on client B, the published application remains open on client A and a new session of the published application opens on client B. By comparison, when multi-session mode is deactivated (single-session mode), the published application session on client A disconnects and reconnects on client B.

The multi-session mode feature has the following limitations.

  • Multi-session mode does not work for applications that do not support multiple instances, such as Skype for Business.
  • If the application session is disconnected while you are using a published application in multi-session mode, you are logged off automatically and any unsaved data is lost.


A Horizon administrator must activate multi-session mode for the application pool. End users cannot modify the multi-session mode for a published application unless a Horizon administrator allows it. See Windows Desktops and Applications in Horizon.


  1. Connect to a server.
  2. Click the Settings toolbar button in the upper-right corner of the desktop and application selector window, scroll down to the Multi-Launch setting, and click Set.
    Alternatively, if you previously started a remote desktop or published application, you can click the Open Menu button in the sidebar, click Settings, and scroll down to the Multi-Launch setting. If no published applications are available to use in multi-session mode, the Multi-Launch setting is dimmed.
  3. Select the published applications that you want to use in multi-session mode and click OK.
    If a Horizon administrator has enforced multi-session mode for a published application, you cannot change this setting.