windows-authentication (NTLM) fail every 15 minutes

Игорь Арасланов 1 Reputation point

There is a client application that send http-requests to the IIS web-service with ISAPI extension every second. Authentication is performed using the NTLM protocol. Stable every 15 minutes, connection cannot be established due to HTTP-code 401. ISAPI extension return error 0x8009030e SSPI-function InitializeSecurityContext. What could be the problem? Maybe 15 minutes is TTL any ticket or credential cache?

Internet Information Services
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