Citrix sessions left open due to Server Security system tray icon on end-user desktop

Issue:

When launching Citrix sessions/applications, the Business Suite Server Security or Email and Server Security system tray icon will also appear on the end-users machine, and will remain on the machine after closing the Citrix application. The F-Secure process for the user needs to be closed separately from the Citrix side to fully terminate the session.

Resolution:

To hide the system tray icon for Server Security 15 and later, disable the Show local user interface setting via Policy Manager:

1. Log in to Policy Manager Console
2. Select a host or policy domain from the domain tree
3. Go to the Settings tab
4. Go to the Windows > Centralized management settings page
5. Scroll down to the Local user interface section
6. Uncheck the Show local user interface setting
7. Distribute the policy (Ctrl + D)

(Note: If needed, the administrator can open the user interface after changing Show local user interface setting. The administrator can run the fsmaincorporate.exe executable from the product installation folder: C:\Program Files (x86)\F-Secure\Server Security\ui\fsmaincorporate.exe)

The icon appears due to Citrix Seamless Configuration Settings. More information is available from the following link from Citrix:

https://support.citrix.com/article/CTX101644

One option to test is to disable the Citrix tray icon agent, which can be done by adding the following registry key to every VDA machine:

HKEY_LOCAL_MACHINE/System/CurrentControlSet/Control/Citrix/wfshell/TWI 
SeamlessFlags:REG_DWORD = 0x20

It is strongly recommended to familiarize yourself with the information from Citrix before testing the solution, and to do a small-scale test before deploying any changes to production.