IGEL OS 11.03 IGEL OS Articles Citrix Performance Current: Slow Performance of Citrix Session in a Cloud Environment PDF Download PDF Download page Slow Performance of Citrix Session in a Cloud Environment. Current page All pages Slow Performance of Citrix Session in a Cloud Environment SymptomYour cloud-based Citrix session is very slow.EnvironmentIGEL OS 10.05 or higher, up to IGEL OS 11.05 (with IGEL OS 11.06 or higher, the default setting has changed)Citrix client is connected to a cloud server. NOT affected: On-premises and Netscaler environments ProblemThe HDX transport protocol is set to "UDP with fallback to TCP", which causes slow performance. SolutionOpen the UMS configuration dialog or the local Setup and go to Citrix > Citrix Global > Options.Set HDX Adaptive Transport over EFT to"TCP only UDP disabled" and click Apply or Ok.When the Citrix client is started again, the performance should be better. ×