IGEL OS 10.05 IGEL OS Articles Miscellaneous Passthrough Authentication Session Configuration Current: Citrix Legacy ICA Sessions PDF Download PDF Download page Citrix Legacy ICA Sessions. Current page All pages Citrix Legacy ICA Sessions To activate Kerberos passthrough for all ICA sessions:Go to Sessions > Citrix XenDesktop / XenApp > HDX/ICA Global > Local Logon.Activate Use Kerberos Passthrough authentication for all ICA sessions.To activate passthrough for a specific ICA session:Go to Sessions > Citrix XenDesktop / XenApp > Legacy ICA Sessions > [session name] > Logon.Select the passthrough method:To use Kerberos passthrough, activate Use Kerberos Passthrough authentication for this session.To use passthrough (with the cached local thin client credentials), activate Use Passthrough authentication for this session. ×