same app launched twice

M

MarcoJ6

Bit poster
We have a minor issue with our published applications.

When an application, such as the calculator, is launched twice on a Windows 10 client, how can we prevent both instances from appearing in front of all other applications when one is clicked? Currently, only if Calculator 2 is minimized beforehand does it not show in the foreground of other apps on screen 2. Is there a way to manage this through settings?

Thank you for your assistance.
 
Hey Marco

This behavior usually comes down to how Parallels RAS handles window focus and session management for published apps in multi-instance mode. When the same application (like Calculator) is launched twice, each instance is treated as a separate session, so Windows tends to bring both to the foreground when one gains focus -- especially if "Show windows from all sessions" is enabled.

A few things you can try:

  1. Enable Single Instance Mode for that app in the RAS Console.
    • Go to Publishing → Applications → [Your App] → Properties → General

    • Check "Allow only a single instance of the application".
      This ensures that if the user launches the app again, the existing session is reused.
  2. Review Smart Sizing / Window Behavior settings under the Client Policies to ensure focus behavior is consistent across monitors.

  3. If you specifically want to allow multiple instances but control focus, you might need to handle that at the Windows level with focus-stealing prevention policies or group policies.
This is a common quirk with lightweight Windows apps like Calculator since they don't maintain separate process states very well under RDS.

Hope that helps smooth it out!
 
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