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I am trying to change our wireless access points to use RADIUS. I have installed Network Policy Server on a server and pointed our wireless access points RADIUS settings to it.

I have allowed all Domain Users in the policy.

However when a client attempts to connect to the wireless network using the 'Use my Windows account' option (I have also tested manually entering DOMAIN\user etc. with the same results) the client shows the error message

Unable to connect to this network

I have checked the Event Viewer on the server where Network Policy server is installed and this error message is generated each time a client tries to connect

Negotiation failed. No available EAP methods

Here is a screenshot of the properties of the policy.

enter image description here

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I was having this issue, and maybe you've resolved it or moved onto a different RADIUS server at this point. But for anyone else that comes across this remember to check certificates, even if you are only using username/password a valid certificate must be present on the NPS server. I was getting the exact same messages until I resolved this.

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