You need to gather the required report information for your email users.
What should you do?
A . In the Security & Compliance admin center, use the Top Mail Senders report.
B . In the Exchange admin center, use the spam filter.
C . In the Office 365 Admin center, use the Email Activity Usage report
D . In the Office 365 Admin center, use the Top Rule Matches for Mail report.
E . In the Security & Compliance admin center, use the Spam Detections report
Answer: A
Explanation:
https://docs.microsoft.com/en-us/office365/securitycompliance/view-email-security-reports#top-senders-and-recipients-report