Hello,
We have a Cisco Aironet 1140 AP that is setup to use RADIUS authentication against our NPS server. The server has a 'Connection Request Policy' setup to use EAP (PEAP) authentication. I have a certificate installed on the NPS server from an AD Enterprise CA. Unfortunately, we are unable to authenticate our Wi-Fi users using RADIUS authentication. We receive the following errors in the Windows System event log.
Error: Event ID 18 - "An Access-Request message was received from RADIUS client 10.40.0.200 with a message authenticator attribute that is not valid."
Any help would be appreciated. Thank you, Doug