Microsoft will begin notifying you weekly if you have messages that have been quarantined.  You can review the emails that have been quarantined by visiting https://protection.office.com/#/quarantine and signing in using your Lesley credentials (email and password).


On the Quarantine page, there will be a list of emails that were sent to you and identified as spam.  You can search for messages or sort.  Double-click a quarantined email to view the details or take action. If the message wasn't actually spam, you can move it to your inbox and report that it is not SPAM to the Microsoft Spam Analysis Team.


Microsoft quarantine spam email screenshot



Microsoft: Find and Release Quarantine Messages