Wireless WPA2 enterprise with Windows Network Policy Server (NPS) and Active Directory PEAP authentication – How to fix Event ID 6273 and Reason code 16

event id 6273 reason code 16

If you are setting up a WPA2 enterprise Wifi network using Windows Network Policy Server and RADIUS, make sure that the NPS server is using a trusted certificate where the name of the NPS server is explicitly mentioned in the certificate.

If you are attempting to use a wildcard certificate on your NPS server, Windows clients will fail to connect and the server security log will show Event ID 6273 with reason code 16.

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