Verify the date on the workstation is incorrect. The SSL certificate checks the workstation's date when validating.
 

Reinstall VeriSign's updated intermediate certificate which matches your Internet Browser.

Note: Refer to Citrix Solution CTX103235 for more details.

Note: We provide links to third-party websites in an effort to help you resolve your issue. We are not responsible for the information on third-party websites, and we cannot assist with implementing resolutions from these websites.