From "OneSign Option" window you can also configure parameters related to the Citrix XenDesktop connection.
Click on "XenDesktop Settings" button. It will open a new window.
Here you may change option related to USB redirection.
¶ Importing CA Certificate for Citrix Connections
Export the CA Certificate from Certification Authority Server in Base64 format.
Copy the exported certificate on a USB Key and insert the USB Key in the thin client.
Open the "Terminal Properties" window and select "Control Panel" tab. Double-click on "ICA Global Settings".
Select the "Advanced" tab and click on "Add Certificate...".
Browse the USB Key, select the certificate and import it into the thin client clicking on “OK”.