Problem:
First user in an AVD Multi-session host using RemoteApp/AppAttach, the remote app launches successfully - The next user who logs into the same Session Host using the same FlexApp, the remoteapp session does not launch at all.
Resolution:
On the Session Host as Administrator:
Edit: "C:\Program Files\ProfileUnity\FlexApp\CTL\JitCut.dll.config"
Find the setting:
<setting name="Validate" serializeAs="String">
<value>True</value>
</setting>Change it to:
<setting name="Validate" serializeAs="String">
<value>False</value>
</setting>Save the file. You will need admin rights for this.
Reboot the Session host to clear any "stuck" sessions.
Now, it should work for the second user, and any others.
Notes:
The Validate setting in JitCut.dll.config controls whether the CTL (Click-To-Layer) engine performs additional checks before activating a FlexApp/App Attach package for a user session.
Setting:Validate = False
skips these additional checks and allows the activation to proceed normally for each session. This often resolves false validation failures in multi-session environments.
Product: ProfileUnity-FlexApp
Product Version: 6.8.7 and above
Updated: March 9, 2026