Well, this issue was occurred to me last weekend, when I was busying myself changing my Citrix XenApp servers from farm A to farm B, using GUI. Why? because I have nothing to do (on weekend? seriously??). Please put my forever alone life aside, shall we? Well, this issue occurred to my XenApp 5 for Server 2008 farm. Hmm, Server 2008 is the keyword there... :) Issues : Citrix Admins received below screen after putting the credential for ODBC Driver Access. Citrix Admins can't move forward, as the GIU will froze just after putting the credential. Troubleshooting  Go to Start > Run , and type SecPol.msc   You will be prompted with all UAC permission, so just proceed accordingly Click at I want to complete this task Press Ctrl + Alt + End Press Continue After that, you will see this console. Our focus is on Security Settings > Local Policies > Security Options On the right column, find this configuration, and check the setting con