I have a TAC ticket going on since my remote RADIUS user with an FTM stopped working after upgrading the FortiAuthenticator from 6.3.3 to 6.4.4. Then I was told to configure a remote RADIUS username with a realm as just like "tesumi" without a realm name "@realm1". I had "tesumi@realm1" as my remote username and I believe it was working with 6.3.3 (not 100% sure because it's not in production and still testing multiple things).
My question now is if this username configuration under User Mangement->Remote Users->RADIUS has been supposed to be configured WITHOUT a realm name from the beginning? Or it has changed with 6.4?
Even this change, I'm still having a problem if I configured another realm "realm2" with the same username "tesumi" to point to a different remote RADIUS server. Push notification times out. That's why the TT is still on-going but that part would be a topic for another time.