Logon Prompt Extension is not being deployed via GPO
There could be several different reason of such an issue, additionaal information is required for the investigation.
In order to further investigate the issue please allow GPO software installation logging as per Microsoft KB –http://support.microsoft.com/kb/249621:
1. On the problematic client computer launch regedit and navigate to the following key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Diagnostics
You may have to create the Diagnostics registry subkey (in case it’s not present)
2. In Diagnostics key create new value:
Value: 4b (HEX)
3. Reproduce the issue – try to install the Logon Prompt Extension via GPO.
4. Create new ticket on our site (http://www.netwrix.com/support_ticket.html) and send diagnostic file %SystemRoot%\Debug\UserMode\Appmgmt.log
NOTE: We recommend that you delete the AppMgmtDebugLevel registry value to avoid performance degradation after sending log files to us