Hello everyone !
I'm currently stuck on some weird issues. NPS server's event viewer sends a lot of those error messages (Event ID 18).
I tried multiple times to re-enter the shared secret on both the NPS Client and Instant AP RADIUS Server info. When I re-enter the secret, the authentications work for some time and then they stop working and results in this error again.
When I look into Wireshark, I see Acces-Request from IAP to NPS and Access-Challenge from NPS to IAP. I don't see any Access-Accept or Access-Reject. I guess the IAP doesn't receive it.
I also tried re-creating radius server and upgrading firmware to latest General Avaibality (6.4.2.6 4.1.1.12)
Thanks !