Refer to the exhibit. You run the KQL query in Microsoft Sentinel. The query returns zero results even though you know user@contoso.com has had failed sign-in attempts in the last 30 days. What is the most likely reason?
The field might be named differently, e.g., UserId or UPN.
Why this answer
Option D is correct because the query filters by UserPrincipalName, which may not match the actual data field (e.g., it could be UserId or different format). Option A is wrong because the query uses ago(30d). Option B is wrong because the query includes all results.
Option C is wrong because the query uses summarize correctly.