Here is scenario. I have setup several WLANs and they authenticate with PEAP using IAS and our self generated trusted authority certs. I have been been able to make this work with regular laptops, but we just got a tablet with Windows XP Tablet Edition in for some testing and when I try to install the cert it says it is not expired or not validated yet. I have got it to work on laptops that weren't part of our domain, but this Windows Tablet thing has me mystified. Has anyone made this work??