Troubleshooting Tip: RADIUS authentication failure even after enabling the Message-Authenticator attribute on Windows server

[Oscar_Wee]

Description	This article describes an issue when the Windows server displays event-ID 17 after working normally for some time.
Scope	FortiGate v7.2.10 and v7.4.5.
Solution	FortiGate was able to successfully authenticate via RADIUS using Windows Server NPS after enabling the Message-Authenticator attribute on the Windows server. However, after some time, an event ID-17 was observed on Windows Server. This could be due to network issues unrelated to NPS. Network issues: In the course of transmission, there is a possibility of data corruption, owning to packet loss transmission errors or unreliable connections.    Wait for some time to verify that the problem is solved. If the problem is not solved, refer to: https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2008-R2-and-2008/c...