Configure the Enlightened Data Transport UDP Protocol (EDT) when using the Citrix Cloud Virtual Apps and Desktops – XenApp and XenDesktop Service with the VDA and NetScaler placed in the Microsoft Azure
Citrix changing default ICA Protocol from TCP to UDP Q4 2017 - Xenit
Understanding how the Citrix Context works with the Citrix ICA file | Pega
Explaining ICA Session Reliability, Common Gateway Protocol, on TCP Port 2598
Connecting with a Citrix ICA File
Citrix Cloud remote setup with NetScaler Gateway Services | Marius Sandbu