Pharos Suite 8.3 and earlier supports Windows Terminal Services and Citrix in the following ways
Pharos Uniprint Popup clients - Pharos Popups are currently supported on Windows Terminals Services with limitations (please read the following Knowledge Base Article).
Title: Multiple Popup Problem when using Windows Terminal Services
Pharos Popups are not supported in a Citrix environment.
Pharos Signup clients - cannot currently be installed and the product is not supported using Windows Terminal Services or Citrix thin client machines