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The maximum resolution supported by Framehawk is currently 2048×2048.From CTX200257 – Screen Issues Connecting to 4K Resolution Monitors: Symptom: A blank or corrupt screen is displayed when connecting to Windows 7 or 8.1 Standard Xen Desktop Virtual Delivery Agents on a client which has one or more 4K resolution monitors.For Flash Redirection to work with Internet Explorer 11 set the registry key value IEBrowser Maximum Major Version to 11 on the machine where HDX flash service is running.In case of Xen Desktop it would be the machine where VDA is installed.To enable Framehawk, see On 2012 R2 RDSH, the only way to configure Remote Desktop Licensing is using group policy (local or domain). The solution was to delete the REG_BINARY in HKEY_LOCAL_MACHINE\SYSTEM\Current Control Set\Control\Terminal Server\RCM\Grace Period only leaving the default.You must take ownership and give admin users full control to be able to delete this value.On the VDA, use the following registry change to set the length of time a client session waits before disconnecting the session: From Xenapp 7.8 – Session Launch Security/Warning Login Banner at Citrix Discussions: If your logon disclaimer window has scroll bars, set the following registry values: HKLM\Software\Wow6432node\Citrix\Ctx Hook\App Init_DLLS\Multiple Monitor Hook\Logon UIWidth = DWORD:300 HKLM\Software\Wow6432node\Citrix\Ctx Hook\App Init_DLLS\Multiple Monitor Hook\Logon UIHeight = DWORD:200 Citrix CTX203760 VDI Session Launches Then Disappears: Xen Desktop, by default, only allows 180 seconds to complete a logon operation.The timeout can be increased by setting the following: HKLM\SOFTWARE\Citrix\Port ICA Add a new DWORD Auto Logon Timeout and set the value to decimal 240 or higher (up to 3600).
After the loading, the dialog box disappears and the explorer application fails to appear.
VDA 7.8 has a new Telemetry Service to collect diagnostics info.
You can run Power Shell commands to enable the service and schedule automatic uploads to Citrix Insight Services.
A new local group called Direct Access Users is created on each Virtual Delivery Agent.
Add your non-administrator RDP users to this local group so they can RDP directly to the machine.