I was getting a windows login prompt when launching a published Citrix app (XenApp).

After checking all requirements like :

1. RDS Configuration console and check the properties of ICA-tcp.
On the “Log on Settings” tab, make sure that “Always prompt for password” is uncheck

2. local policies and make sure that “Always prompt for password upon connection” is not enabled.

 

It turned out that there suddenly was a missing registry key at location : HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon.

Screenshot - 12_30_2013 , 12_20_51 PM

 

 

String regkey  GinaDLL with value C:\WINDOWS\system32\ctxgina.dll

 

——————–

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
“GinaDLL”=”C:\\WINDOWS\\system32\\ctxgina.dll”

 

 

———————-

 

http://support.citrix.com/article/CTX110533