anonymous user If I understood your question correctly, you acquired a token in application context by using client credentials flow and used that token in order to fetch the sign-in logs. Now you do not see a sign-in event logged for the authentication performed via client credentials flow.
If this is the case, it is by design. We log sign-in events only for interactive logons performed via user accounts. If the authentication is non-interactive, which means it is either done by submitting refresh token or by using client credentials, sign-in event logs will not be logged.
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