While trying to migrate Aruba controller RADIUS authentication for an 802.1x SSID off of a Windows NPS platform and on to Aruba ClearPass, our Windows 10 users were prompted with the following error:
My interpretation of this issue is that the user's stored certificate of the Windows NPS server is not the certificate being presented by ClearPass, so it warns the user something funny is going on. MacOS users don't seem to be affected by this.
My question is whether this is a common scenario, and if there is a way to check the certificate being stored for an 802.1x SSID on a Windows device? I am not having much luck in identifying the stored cert that we "trust" on a per SSID basis.