A certificate could not be found that can be used with this Extensible Authentication Protocol. (Error 798)

This problem occurs if the client certificate is missing from Certificates – Current User\Personal\Certificates.

Solution

Open Certificate Manager: Click Start, type manage computer certificates, and then click manage computer certificates in the search result.

Go to C:\Users<UserName>\AppData\Roaming\Microsoft\Network\Connections\Cm<GUID>, manually install the certificate (*.cer file) on the user and computer’s store.