Hi, I setup the FreeRadius EAP module and an AP to authenticate with PEAP/MSCHAPv2. However when I connect with any laptop (Windows 7), appears the following warning: "Details Radius Server: xpto Root CA: AddTrust External CA Root The server xpto presented a valid certifiate issued by "AddTrust External CA Root", but "AddTrus External CA Root" is not configured as a valid trus anchor for this profile." I attached a image with this warning. If I ignore the warning, I can connect to the Wi-Fi network, however I want understand why this happen and I want that the warning not appear any more in other laptops. I have done several searches but could not solve this problem. Server details: - The server certificate is signed by COMODO - OS: Debian Wheezy - FreeRadius v2.1.12 I attached the eap.conf and the windows 7 warning. Can anyone help me solve this problem? Regards, Helder