Citrix (XenApp) is working fine with the latest agent which is great but I've noticed a small problem. I tend to leave my PC switched on all the time, I've noticed if I leave it on longer than a day when I try to connect to a Citrix application via the NAL I will be prompted for credentials. If I restart the PC then everything works as expected.

Any ideas?

I'll try see if I can get a more accurate duration of time the PC needs to be logged in incase that helps.