IGEL OS 10.05 IGEL OS Reference Manual Sessions Citrix XenDesktop/XenApp HDX / ICA Global Unified Communications Current: Skype for Business PDF Download PDF Download page Skype for Business. Current page All pages Skype for Business Menu path: Setup > Sessions > Citrix XenDesktop / XenApp > HDX / ICA Global > Unified Communications > Skype for BusinessThe HDX Realtime Media Engine is required for using Skype for Business in a HDX/ICA session.HDX Realtime Media Engine ☑ The HDX Realtime Media Engine is active. ☐ The HDX Realtime Media Engine is not active. (Default) ×