[Samba] winbindd authentication fails with NT_STATUS_RPC_SEC_PKG_ERROR intermittently

[Jeremy Allison]

On Mon, Jul 03, 2023 at 01:10:26AM +0530, Bharath Bheemarasetti via samba wrote:
>On further investigation, the error that shows up in packet capture is that
>the DC is returning [Fault: nca_s_fault_sec_pkg_error] for the
>NetrLogonSamLogonEx call. There are no error logs (or any logs) regarding
>the netlogon call failure in the netlogon logs even after enabling debug
>logs in the DC. One more interesting thing is restarting the netlogon.exe
>service on the DC also fixes the issue temporarily similar to restarting
>the smb service

That sounds like netlogon.exe crashing in some way. Have you
reported this to Microsoft ?