I recently tried to access VPN site (Netscaler SSLVPN ) from Windows 8.1 laptop However i could not connect to the resources . After checking the logs , i found that the AGEE client version on the laptop was not correct as it did not match the server version we had (10.125.8) I downloaded the AGEE version specific to our Netscaler Environment (10.125.9) in our case. After installing this version of AGEE and restarting the laptop , i was then able to connect to the VPN resources. Hope this helps.